MDA800 Motor Drive Analyzer
( and HDO8000 Series Oscilloscopes )
MDA800 – Motor Drive Analyzer
ƒ
Complete Motor Drive System Debug and
Validation
ƒ
Three-Phase Power Measurements
( Real , Apparent and Reactive)
ƒ
Efficiency Measurements
ƒ
Per-Cycle Time-Correlated Waveforms
From Power Values
ƒ
Dynamic Drive response Analysis, from
Startup to Overload
ƒ
Complete Motor Integration
( Torque, Speed, Position )
ƒ
User-Configurable Power Table and
Graphical User Interface
ƒ
Unique Zoom+Gate Mode
Teledyne LeCroy Company Confidential
10/2/14
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MDA support the complete design and debug challenge
for the motor drive engineer
ƒ
Power Section
Measurements
ƒ
ƒ
ƒ
ƒ
Motor Integration
ƒ
ƒ
ƒ
ƒ
ƒ
Line input
PWM output
Efficiencies
Torque
Speed
Position
Power
Embedded
Control Debug
ƒ
ƒ
ƒ
ƒ
ƒ
Analog
Digital
Serial Data
Control Loop
PWM
Teledyne LeCroy Company Confidential
10/2/14
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Motor Drive Analyzers – Unique Positioning
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It’s an Oscilloscope, and it’s also a Power Analyzer with Motor Integration
ƒ General-purpose 8 ch, 12-bit
scopes up to 1 GHz plus 32 Digital
Channels
ƒ Static (steady-state) “mean value”
tables, like a power analyzer
ƒ Dynamic (transient) analysis
ƒ Complete embedded control debug
(i.e. it is a fully-functional oscilloscope)
ƒ High SR, BW, Memory
ƒ Mixed Signal
ƒ Serial Trigger & Decode
ƒ More complete motor integration
Teledyne LeCroy
Motor Drive Analyzer
8ch, 12-bit
General-purpose Oscilloscope
(BW, SR, Memory, MSO, Serial Trigger/Decode,
IGBT/MOSFET Device Test)
Teledyne LeCroy Company Confidential
10/2/14
Introducing the Teledyne LeCroy HDO8000 Oscilloscope
ƒ
8 analog input channels , Mixed-signal (MSO) option 16 Ch
ƒ
ƒ
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Highest Accuracy
ƒ
ƒ
ƒ Active/passive
ƒ High voltage differential (1000Vrms)
ƒ Current
ƒ Differential amplifiers
Connect up to 8 current probes at one time
Serial Trigger/Decode
ƒ
ƒ
12-bit HD4096 High Definition Technology
ƒ “16x closer to perfect”
Comprehensive availability of Probing
ƒ
ƒ
Ideal for high power and three-phase power electronics analysis
Very useful for deeply embedded electronic/mechatronic systems
19 different low-speed serial trigger/decode solutions available
Faster
ƒ
Up to 1 GHz
ƒ
Bandwidth for today’s and tomorrow’s technologies
Support for WQXGA (3840x2160 pixels) Extended Desktop
ƒ Add a larger touchscreen display to the
HDO8000
ƒ View a 3rd party
program (e.g.
MATLAB) on the
oscilloscope display
ƒ Locate oscilloscope
near DUT and the
larger display farther
away
HDO8000 Oscilloscope - Powerful Analytics
ƒ
Most powerful motherboard in its class
ƒ
ƒ
ƒ
ƒ
Long acquisition memory
ƒ
ƒ
ƒ
50 Mpts/ch standard, up to 250 Mpts/ch
optional
Ideal for several seconds of data
capture
More Waveforms
ƒ
ƒ
ƒ
Intel® CoreTM i5-4670s Quad (core)
2.9 GHz (per core)
up to 32 GB of RAM
Up to 40 total, displayable
12 Math, 12 Zoom, 12 Memory
waveforms
Modern, oscilloscope user-interface
ƒ
ƒ
Teledyne LeCroy’s MAUI scope
operating software running on Windows
7 OS
Supports 3rd party software (e.g.
MATLAB) running on scope
What is a Motor Drive Analyzer?
ƒ
It is a new model series (MDA8xx)
ƒ
ƒ
ƒ
It is built on the HDO8000 platform
All MDA specifications are same as
HDO8000 of equivalent bandwidth
All MDA800 available options, accessories,
and probes are the same as HDO8000
ƒ
It contains the “Motor Drive Power
Analyzer” firmware capabilities
ƒ
It contains advanced X-Y capability
ƒ
ƒ
This capability is not available on HDO8000
It has MDA-specific bezel buttons
Teledyne LeCroy Company Confidential
10/2/14
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Motor Drive Analyzer Graphical User Interface
ƒ Simple , Intuitive user interface
Numerics Table
for short record
power analysis, like
a Power Analyzer
Long Record
Dynamic Analysis
toolsets that Power
Analyzers don’t have
Most Complete
Mechanical Motor
Integration
Intuitive Wiring
Configuration Setup
Diagrams
“This is much nicer
than a power analyzer”
Teledyne LeCroy Company Confidential
10/2/14
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Powerful Analysis : Brushless DC Power Tool
Teledyne LeCroy Company Confidential
10/2/14
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MDA800 Motor Drive Analyzer Value Proposition
ƒ
Static
ƒ
ƒ
Dynamic
ƒ
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It can calculate three-phase power and motor mechanical torque/speed values for short
record, static (steady-state) operating conditions.
It can capture long record, dynamic operating events and contains advanced tools for percycle analysis and correlation to other events. Unique capabilities !
Complete
ƒ
ƒ
It’s an 8-channel (+16 digital), high definition (12-bit) oscilloscope that can perform
complex debug of the embedded control system
MDO800 can debug anything in the full drive system:
ƒ Motor (mechanical) measurements
ƒ Motor Drive input/output (AC Line Input, DC Bus, Drive Output) measurements
ƒ Inverter subsection characterization and debug (e.g. power semiconductor device
loss/operation, switching problems)
ƒ Embedded control system debug
ƒ All of the above working together as a complete Drive System
Teledyne LeCroy Company Confidential
10/2/14
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MDA800 Motor Drive Analyzer Value Proposition - Summary
Capability
Teledyne LeCroy MDA800
Motor Drive Analyzer
Static
Power
Analysis
Yes
Dynamic
Power
Analysis
Yes
Complete
Test
Capability
Yes
Short records.
Constant load/speed.
Numerics value table.
Long time durations
Variable loads/speeds.
Statistics Table.
Per-cycle Waveforms.
Mixed Signal (MSO).
Serial Trigger & Decode.
Oscilloscope Tools.
Probes & Accessories.
Teledyne LeCroy Company Confidential
10/2/14
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MDA - Overall Hardware Summary
Teledyne LeCroy MDA800 Motor Drive Analyzer
Inputs
8 analog,
+16 digital (optional)
Resolution
12-bits
Bandwidth
350 MHz - 1 GHz
Sample Rate
Memory
Specified Power Measurement
Accuracy
Probe Integration
HV Isolation
Filtering
2.5 GS/s
50 Mpts/Ch standard
250 Mpts/Ch maximum
~1% voltage/current
~1% power
(typical expected, using probes)
Complete
Yes, 1000Vrms
(using HVD Series voltage probes)
Yes (ERES)
(software post-processing)
Teledyne LeCroy Company Confidential
10/2/14
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MDA : Overall Capability
For complete drive system debug and validation – power + control + motor
Teledyne LeCroy HDO8038 + Motor Drive Power
Analyzer SW
Embedded Control Debug and Validation
(Analog, Digital, Serial Data trigger and
capture)
Power Semiconductor Device Analysis
(Device Losses, RDS ON, etc.)
Yes
Yes
(with PWR option, suitable probes, optional)
Power System (Inverter) Analysis Toolset
3-phase power, voltage, current
measurements and waveforms
Yes
Motor Integration
Speed and Torque sensors
Yes
Teledyne LeCroy Company Confidential
10/2/14
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MDA : 3-phase Power and Motor Interface
Feature Set and Capability Comparison
Capability
“Static”
Power Analysis
(Numeric table)
Numeric Values + Table
Yes
Each Phase and Σ3-ph values
Yes
Line-Line to
Line-Neutral Conversion
Yes
(standard)
Efficiency Calculations
Yes
Per-cycle Values
Yes
“Dynamic”
Power Analysis
Per Cycle V, I, PWR Waveforms
Yes
Per-cycle Values and Statistics
Yes
Harmonics
Drive Input/Output Harmonics
Planned
Torque
Motor Integration
Speed, Direction, Position
Yes
Yes
(standard, comprehensive)
Teledyne LeCroy Company Confidential
10/2/14
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MDA and HDO8000 oscilloscope : Capabilities Comparison
Teledyne LeCroy Company Confidential
10/2/14
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High Bandwidth and Long Acquisition Memory are
Important in the Motor Drive Analyzer
for Device Characterization and Embedded Control System Test
Back to Beginning
High Bandwidth is Important in the Motor Drive Analyzer
for Device Characterization and Embedded Control System Test
ƒ
IGBT/MOSFET Characterization
ƒ
Current silicon (Si) devices have rise
times of ~30 ns
ƒ ~100 MHz required
ƒ
Next-generation silicon-carbide (SiC) or
gallium-nitride (GaN) deployed with faster
rise times
ƒ ~500 MHz to 1 GHz oscilloscope
bandwidth desired
ƒ
ƒ
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Control Microprocessor Speed Can
Range up to 700 MHz
ƒ
ƒ
ƒ
1ns device rise time
Perhaps 5ns as designed into a drive
e.g. Vector FOC controls
Up to 1 GHz oscilloscope bandwidth
required
MDA 350MHz, 500 MHz and 1 GHz
Teledyne LeCroy Company Confidential
10/2/14
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Long Acquisition Memory is Useful in the Motor Drive Analyzer
For dynamic capture and analysis under changing loads, speeds, and control conditions
ƒ Dynamic Response Debug
ƒ Start-up to Steady-State, or
vice-a-versa
ƒ Rapidly changing load
conditions
ƒ Debug of Control and/or
Gate-drive Problems (high
frequency) to Power Cycle
(low frequency) behaviors
ƒ MDA long memory
(100Mpt/Ch–L) and
(250Mpt/Ch–XL) options
ƒ Std. 50 Mpt/Ch
ƒ Very high value
Teledyne LeCroy Company Confidential
10/2/14
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Motor Drive Analizer - MDA
Software Capability Overview
Motor Drive Analysis Setup Dialog Overview
Push “Drive Setup” button or Select “Motor Analysis” from Analysis pull-down
Multi-tab structure,
like SDAIII
Wiring diagram and
channel assignments –
1 for each power
section
Combined iconic setup indication
and shortcut button to dialog/tab
Mechanical (torque and
speed) selections and
channel assignments
3-phase Power and Motor
Measurements numerics
table setup
Per-cycle “synthesized”
Waveforms and Statistics
Setup summary
Shortcut buttons to
dialog/tab
Teledyne LeCroy Company Confidential
10/2/14
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AC Input Setup Dialog Overview
Wiring
configuration
selection
L-L to L-N voltage conversion
(when applicable, selectable
individually for each power
section tab)
Wiring setup
image changes
dynamically with
selected wiring
configuration
AC Input Voltage and
Current Assignments
Waveform period
synchronization setup (for
per-cycle measurement
analysis)
Enable Zoom+Gate –
button and indicator
(gray when “ON”)
Teledyne LeCroy Company Confidential
10/2/14
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DC Bus Setup Dialog Overview
Wiring
configuration
selection
Wiring setup
image changes
dynamically with
selected wiring
configuration
DC Bus Voltage
and Current
Assignments
Waveform period
synchronization setup (for
per-cycle measurement
analysis)
Enable Zoom+Gate –
button and indicator
(gray when “ON”)
Teledyne LeCroy Company Confidential
10/2/14
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Drive Output Setup Dialog Overview
Wiring
configuration
selection
L-L to L-N voltage conversion
(when applicable, selectable
individually for each power
section tab)
Wiring setup
image changes
dynamically with
selected wiring
configuration
Harmonic Filter
Setup
Drive Output Voltage and
Current Assignments
Waveform period
synchronization setup (for
per-cycle measurement
analysis)
Enable Zoom+Gate –
button and indicator
(gray when “ON”)
Teledyne LeCroy Company Confidential
10/2/14
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Wiring Configuration - Setup
Complete wiring configuration selection, with L-L to L-N voltage conversion standard
ƒ
Wiring configuration is userselectable
ƒ We support the same 1-phase and 3phase configurations
ƒ
Line-Line (L-L) to Line-Neutral (L-N)
conversion is a standard feature
ƒ Intuitive, graphical UI makes for
better understanding of required
three-phase connections
ƒ “That’s nice !
Corresponding graphical
setup image appears
Teledyne LeCroy Company Confidential
10/2/14
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Intuitive 3-phase, 3-wire (3V3A) Associations
Voltages and Currents Associate in an Intuitive Fashion
ƒ More intuitive line-line voltage and line current associations
ƒ VRS -› IR
ƒ VST -› IS
ƒ VTR -› IT
ƒ It’s easy to remember how to set up the wiring assignments
ƒ When acquired, L-L voltage and L-N currents “associate” in an
expected way
Teledyne LeCroy Company Confidential
10/2/14
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“Per Cycle” Measurement Technique for Power Analysis
The selected Sync signal determines the measurement period
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Take a long acquisition
ƒ
ƒ
We know how to do this – this is what we in
serial data jitter analysis
In each “sliced” period
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ƒ
ƒ
ƒ
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Only two cycles are shown, to the right, as
an example
Detect the cyclical period, and “slice” the
waveforms into these periods
ƒ
ƒ
one period
Calculate Real Power (P) as
instantaneously V * I sampled data
Calculate Apparent Power (S) as Vrms * Irms
for each cyclical period
“N” measurement values for “N” cyclical
periods in each acquisition
Solve for Q, as before.
Calculate VDC, IDC, Ipeak, Vpeak, etc. as well on a
per-cycle basis
Teledyne LeCroy Company Confidential
10/2/14
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Drive Output Harmonic Filter
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ƒ
ƒ
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Drive PWM Output contains a lot of high frequency “harmonic” content
Motors are by nature LC filters – they filter this content out
Capability to look at Numerics data with a filter applied at the output
This is a line-line voltage probed example with a L-L to L-N conversion
applied to the Numerics data
ƒ At fundamental only, Apparent Power and Reactive Power values are
reduced, Power Factor goes up, and Phase Angle goes down (as
expected)
Teledyne LeCroy Company Confidential
10/2/14
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Zoom+Gate Operation
Push “Zoom+Gate” button to create Zooms and Gate the Numerics table to zoomed area
Zooms
Zoomed
Area in
Acquisition
Displayed
Sync
Signal is
Zoomed
Original, Full
Record
Length
Acquisitions
Per-cycle
“synthesized”
Waveforms
are Zoomed
All table
data is
calculated
on zoomed
area only
Light Glows “ON” when in Zoom+Gate mode
Teledyne LeCroy Company Confidential
10/2/14
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Mechanical Setup Dialog Overview
Torque
Sensing
Method
Selection
Select Units,
Filter Cutoff,
and Scaling
Select the analog channel to
use for Torque sensing input
Speed,
Angle,
Direction
Method
Selection
Speed & Angle setup
changes depending on
Method selected
Rotation
direction is
arbitrary –
select one of
these to get
correct sign of
rotation
parameter
“Angle” is the arbitrary shaft
rotation angle. “Offset
Angle” allows correction to
something not arbitrary (e.g.
rotor field)
Waveform period
synchronization setup (for
per-cycle measurement
analysis)
Enable Zoom+Gate –
button and indicator
(gray when “ON”)
Teledyne LeCroy Company Confidential
10/2/14
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Mechanical Setup – The Most Complete Motor Sensor Integration
Standard with MDA – Teledyne LeCroy
ƒ Torque Load Cells
ƒ Analog and Digital Speed Sensors
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ƒ
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Analog/Pulse Tachometer (speed)
Hall Sensor (speed and direction)
Resolver (speed and direction)
Quadrature Encoder Interface (speed, direction, absolute position)
Teledyne LeCroy Company Confidential
10/2/14
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Mechanical Setup – The Most Complete Motor Sensor Integration
Speed x Torque = Mechanical Power, so complete sensor support is critical
Sensor Type
Sensing Capability
Fully-supported.
Analog Tachometer
Digital (Pulse)
Tachometer
Speed
Hall Effect Sensors
Resolver
Teledyne
LeCroy
Standard
Capability
Speed +
Direction
Fully-supported.
Fully-supported.
Commonly used in BLDC applications. Signals are digital, so MSO
inputs can be used for sensing, preserving analog channels for other
needs.
Fully-supported.
Commonly used in Vector FOC motor drives where high-precision and
reliability is required (e.g. hybrid/EV vehicle propulsion)
Quadrature Encoder
Interface (QEI)
Speed +
Direction + Absolute
Position
Fully-supported.
Commonly used in Vector FOC motor drives as it provides absolute
position of rotor field. Engineers may debug with QEI even when
production drives use Resolvers.
Analog Load Cell
Torque
Fully-supported.
Teledyne LeCroy Company Confidential
10/2/14
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Numeric Table Setup Dialog Overview
Push “Numerics” button to open setup dialog and/or display Numerics table
Check the box
to display the
table
Table row (source)
selections dynamically
change based on
wiring configuration
Table column
(measurement) selections
are made here
Mechanical Units Selection
Enable Zoom+Gate –
button and indicator
(gray when “ON”)
Teledyne LeCroy Company Confidential
10/2/14
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Numeric Voltage, Current and Power Results Table
ƒ User-Configurable “Power” Results Table (up to 10 rows and 12 columns)
ƒ Selection of Rows and Columns Populates the Results Table
ƒ Probe Line-Line (L-L) and Display Results in Line-Neutral (L-N)
ƒ Using L-L to L-N conversion
Teledyne LeCroy Company Confidential
10/2/14
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Waveform (Voltage and Current) Acquisition
with Numeric Voltage, Current and Power Results Table Shown
ƒ Completely New for LeCroy!
ƒ Displays the mean value of
parameter for the complete
acquisition
ƒ Single table, easy to configure
ƒ Up to 10 rows x 12 columns
ƒ 120 measurements in one table
ƒ Inherently customizable
ƒ Populates as selections made
Teledyne LeCroy Company Confidential
10/2/14
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Per-Cycle “Synthesized” Waveforms and Statistics
Unique Teledyne LeCroy features!
ƒ Click on a
Numeric table
mean value
Time-correlated waveforms indicate drive system behavior over time
ƒ Get detailed
statistics on all
cycles in the
Statistics table
ƒ Create a
Waveform of
the data over
time
Mean value
Mean value
Mean value
Statistical Values
Teledyne LeCroy Company Confidential
10/2/14
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Waveforms+Stats Setup Dialog Overview
Press Waveforms button to open setup dialog and/or display Waveforms + Statistics table
Motor Parameter (MP)
On/Off button and
indicator (gray color =
“on”)
Check the box
Measurement
to display the
(Numerics table
table
column)
Waveform On/Off
Checkbox
Enable Zoom+Gate –
button and indicator
(gray when “ON”)
Waveform Vertical
Scale Settings – active
waveform can be
adjusted
Source (Numerics
table row)
Teledyne LeCroy Company Confidential
10/2/14
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Application 2: Brushless DC Power Tool Analysis
Brushless DC Power Tool Analysis
Teledyne LeCroy Company Confidential
10/2/14
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Teledyne LeCroy Company Confidential
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Probing Requirements for
Different Drive Voltage Ratings
Specifying Probes for Motor Drive Power Section Measurements
Knowing the drive input/output ratings will help you understand what to offer
GroundReferenced “Floating”
Teledyne LeCroy Company Confidential
10/2/14
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Drive “AC Line” Input Voltage Probing Requirements
All Input VAC values in RMS
Input
VAC/VRMS
#
Phases
VPK-PK
VPK
Acceptable Probes
(line-neutral) (Quantity)
(line-line)
120 VAC
1
-
340 VPK
240 VAC
1
-
680 VPK
400 VAC
3
1131 VPK-PK
653 VPK
480 VAC
3
1358 VPK-PK
784 VPK
600 VAC
3
1697 VPK-PK
979 VPK
690 VAC‡
3
1952 VPK-PK
1127 VPK
PP018 (Qty. 1)†
HVP120 (Qty. 1) †
HVD3106 (Qty. 1)
HVD3106 (Qty. 3)
HVP120 probes could also be used
but ONLY for line-neutral probing
If using the PP018 or HVP120, the “neutral” must be at scope ground OR multiple probe
grounds must be tied together and left to “float” (not the same as floating the scope)
‡ Worst case input voltage for 600V class drive
The HVD3106 will provide the customer with the
most probing flexibility AND provide fail-safe safety
with signals that are not connected to ground
†
Teledyne LeCroy Company Confidential
10/2/14
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Drive “AC Line” Input Current Probing Requirements
All Input AAC values in RMS
Input Current
AAC/ARMS
# Input Phases Probe (Quantity)
Up to 30 AAC
1
CP030 (50 MHz) (Qty. 1)
Up to 30 AAC
3
CP030 (50 MHz) (Qty. 3)
Up to 150 AAC
3
CP150 (Qty. 3)
Up to 500 AAC
3
CP500 (Qty. 3)
>500 AAC*
3
Current Shunt
Pearson Current Transformers
Danisense Current Transducers
PEM-UK Rogowski Coils
* These devices may not be DC-coupled. Therefore,
an absolute DC reference may not be maintained and
this may compromise power measurement accuracy
CP Series current probes
cost more, but they do
provide the DC reference
that many customers want
Teledyne LeCroy Company Confidential
10/2/14
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Drive DC Bus/Link Voltage Probing Requirements
All Input VAC values in RMS
Input
VAC/VRMS
Battery
# Phases
DC Bus
Voltage
Probe (Quantity)
-
≤18 VDC
HVD3106 (Qty. 1)
Battery
-
36 VDC
Battery
-
48 VDC
120 VAC
1
170 VDC
240 VAC
1
340 VDC
400 VAC
3
566 VDC
480 VAC
3
679 VDC
600 VAC
3
849 VDC
690 VAC‡
3
976 VDC
PP018† or HVP120 could also be used in a
battery-based system but only if the DC Bus on
the DUT could be forced to earth (scope) ground.
If you are not sure, use an HVD3106.
HVD3106 (Qty. 1)
Included passive or optional HV passive
PP018 is rated for 400VRMS
‡ Worst case input voltage for 600V class drive probes are good values for DC bus probing in
some cases, but HVD3106 can be used anywhere
†
Teledyne LeCroy Company Confidential
10/2/14
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Drive Gate Drive PWM Signal Probing Requirements
Assuming gate drive voltage of 3-24VDC
DC Bus
Voltage
Gate Drive
Voltage
18 VDC
Up to 12 VDC
36 VDC
Up to 12 VDC
48 VDC
Up to 24 VDC
170 VDC
Up to 24 VDC
340 VDC
Up to 24 VDC
566 VDC
Up to 24 VDC
679 VDC
Up to 24 VDC
849 VDC
Up to 24 VDC
976 VDC
Up to 24 VDC
Probe (Quantity)*
ZD200† (Qty. N)
HVD3106 (Qty. N)
HVD3106 (Qty. N)
Due to floating voltages of
gate drive, a differential
probe with appropriate
common-mode rating
must be used
* Quantity depends on how many simultaneous gate drive signals need to be monitored
† Limited to 20V gate drive voltage
Teledyne LeCroy Company Confidential
10/2/14
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Drive DC Bus/Link Current Probing Requirements
All Input AAC values in RMS
Input Current
Probe (Quantity)
Up to 30 AAC
CP030 (50 MHz) (Qty. 1)
Up to 150 AAC
CP150 (Qty. 1)
Up to 500 AAC
CP500 (Qty. 1)
>500 AAC*
Current Shunt
Pearson Current Transformers
Danisense Current Transducers
PEM-UK Rogowski Coils
* These devices may not be DC-coupled. Therefore, an absolute DC reference
may not be maintained and this may compromise power measurement accuracy
CP Series current probes
cost more, but they do
provide the DC reference
that many customers want
Teledyne LeCroy Company Confidential
10/2/14
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Drive 3-phase Output Voltage Probing Requirements
All Input VAC values in RMS
†
DC Bus
Voltage
VPK-PK
Probe (Quantity)
(line-line)
VPK
(line-neutral)
18 VDC
36 VPK-PK
21 VPK
HVD3106 (Qty. 3)
36 VDC
72 VPK-PK
42 VPK
48 VDC
96 VPK-PK
55 VPK
170 VDC
340 VPK-PK
196 VPK
340 VDC
680 VPK-PK
393 VPK
566 VDC
1132 VPK-PK
654 VPK
679 VDC
1358 VPK-PK
784 VPK
849 VDC
1698 VPK-PK
980 VPK
976 VDC
1952 VPK-PK
1127 VPK
PP018 is rated for 400VRMS
HVP120 or PP018† could also be used, but
ONLY for line-neutral probing with the three
ground leads tied to each other (not to scope
ground) and therefore not connected to scope
ground.
PP018† passive probe (for <50V batterysupplied drives) are often grounded to a
common “REF” board connection. The DUT
will usually work fine in this situation.
HVD3106 (Qty. 3)
HVP120 could also be used, but ONLY for
line-neutral probing with the three ground
leads tied to each other (not to scope ground)
and therefore not connected to scope ground.
Line-Line probing is recommended – it is
more intuitive to view the signal this way.
Teledyne LeCroy Company Confidential
10/2/14
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Drive 3-phase Output Current Probing Requirements
All Input AAC values in RMS
Input Current
# Input Phases Probe (Quantity)
Up to 30 AAC
3
CP030 (50 MHz) (Qty. 3)
Up to 150 AAC
3
CP150 (Qty. 3)
Up to 500 AAC
3
CP500 (Qty. 3)
>500 AAC*
3
Current Shunt
Pearson Current Transformers
Danisense Current Transducers
PEM-UK Rogowski Coils
* These devices may not be DC-coupled. Therefore, an absolute DC reference
may not be maintained and this may compromise power measurement accuracy
CP Series current probes
cost more, but they do
provide the DC reference
that many customers want
Teledyne LeCroy Company Confidential
10/2/14
65
HDOs
High Definition
Oscilloscopes
High Definition Oscilloscopes (HDO)
ƒ 12-bit HW ADC resolution,15 bit
with ERES
ƒ Best Signal Fidelity
ƒ Highest Resolution
ƒ Lowest Electrical Noise
ƒ Maximum Accuracy
Teledyne LeCroy’s Innovation in the oscilloscope concept
HD4096 High Definition Technology
ƒ
Combination of
ƒ
ƒ
ƒ
High Sample Rate 12-bit ADCs
High signal-to-noise input amplifiers
Low noise system architecture
ƒ
16 times more resolution than any other
oscilloscope on the market
ƒ
Capture high frequency signals with
1GHz bandwidth
ƒ
Benefits
ƒ
ƒ
ƒ
Clean, Crisp Waveforms
More Signal Details
Precise Waveform Measurements
Waveform Signal Path
Analog-to-Digital
Converter
Amp
Acquisition
Memory
Display
A
D
C
Digitized
Waveform
Analog
Waveform
Processing
Trigger Circuit
SIMPLIFIED OSCILLOSCOPE BLOCK DIAGRAM
High Definition Oscilloscopes
Available Quantization Levels in an
ADC = 2 N bits of Resolution
ƒ
ƒ
ƒ
ADC Resolution
Number of Steps
Dynamic Range
8
256
~48 dB
12
4096
~72 dB
LeCroy HRO 6 Zi
8-bit ADC becomes
12-bit ADC
Quantization levels – 16 times
more for 12-bit scopes
LeCroy oscilloscopes with high
resolution ADCs are the next
generation of oscilloscopes
providing 16 times more resolution
than traditional 8 bit instruments
HDO4000 &
HDO6000
12-bit ADC
Highest Resolution
12-bits provides 16 times resolution compared to 8-bits
ƒ Resolution = The number of available levels
= 2 bits of Resolution
ADC
Resolution
Number of
Steps
Dynamic Range
8
256
48 dB
12
4096
72 dB
Quantization Error
Scope with low resolution
Scope with high resolution
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71
Highest Resolution
12-bit allows detection of smaller signal variations
ƒ
The higher number of bits means the lower measurable voltage
ƒ When measuring an 8 V signal, the
Full Scale
80 V
40 V
20 V
8V
4V
1.6 V
800 mV
400 mV
160 mV
80 mV
40 mV
16 mV
8 mV
Smallest Voltage Step
8 bits
12 bits
312.5 mV
19.5 mV
156.2 mV
9.76 mV
78.1 mV
4.88 mV
31.3 mV
1.95 mV
15.6 mV
976 µV
6.3 mV
390 µV
3.1 mV
195 µV
1.56 mV
97.6 µV
625 µV
39 µV
313 µV
19.5 µV
156 µV
9.76 µV
62.5 µV
3.9 µV
31.2 µV
1.95 µV
smallest detectable voltage variation is
1.95 mV, compared to 31.3 mV on an
8-bit ADC.
Company confidential
2/27/2015
72
8-Bit Scope Baseline Noise
12-Bit Scope Baseline Noise
Comparison of 8-Bit and 12-Bit Acquisitions of ripple waveform
Multi-tone waveform acquired with 8-bit ADC
Multi-tone waveform acquired with 12-bit ADC
Comparison of noise floor and detected peaks of multitone waveform using 8-Bit and 12-Bit acquisitions