雨刮器的介绍与展望
Kevin Wu
Oct. 2015
直流电机
• Magnetic field is from right to left
• Imagine current flows out of the screen in this cross section
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+
SOUTH
2014-03-19
NORTH
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 2
直流电机
• Magnetic field is from right to left
• Imagine current flows out of the screen in this cross section
• The force causes the armature to rotate clockwise
-
+
SOUTH
2014-03-19
NORTH
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 3
直流电机
• At some point, the commutator halves will rotate away
from the brushes
• Momentum keeps the electromagnet and the commutator
ring rotating
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+
SOUTH
2014-03-19
NORTH
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 4
直流电机
• When the commutator halves reconnect with the other brush, the
current in the windings is reversed
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+
SOUTH
2014-03-19
NORTH
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 5
直流电机
• When the commutator halves reconnect with the other brush, the
current in the windings is reversed
• The polarity is reversed and the armature continues to rotate
-
+
SOUTH
2014-03-19
NORTH
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 6
直流电机
• Magnetic field is from right to left
• Imagine current flows out of the screen in this cross section
• The force causes the armature to rotate clockwise
-
+
SOUTH
2014-03-19
NORTH
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 7
直流电机控制
› Bi-directional PM DC motors are controlled with an "H-Bridge"
circuit consisting of the motor and four power switches
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 8
直流电机控制
• One switch is closed in each leg of the "H"
• One switch is open in each leg of the "H"
Current
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 9
直流电机控制
• One switch is closed in each leg of the "H"
• One switch is open in each leg of the "H”
Current
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 10
直流电机控制
• Unidirectional motors are controlled by a “half-H” bridge circuit
Current
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 11
雨刮电机传统控制
内圈
外圈
中圈
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 12
雨刮电机继电器控制
OFF/ON
雨刮控制：
1. 低速控制：ON/OFF继电器工作；
2. 高速控制：ON/OFF 和 LS/HS 继电器都工作；
3. 制动控制：当中心点（上图的a点）为低时，ON/OFF继电器关
闭；电机二端同时接地，形成制动；
4. 点动控制；
5. 喷水控制；
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 13
雨刮电机继电器+MOS控制
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 14
雨刮电机MOS控制
2014-03-19
Copyright © Infineon Technologies AG 2014. All rights reserved.
Page 15
雨刮电机PWM控制
大扭矩和低速
小扭矩和低速？
set date
高速和低扭矩
Copyright © Infineon Technologies AG 2015. All rights reserved.
16
雨刮电机改造
全电压时高速；
低电压时大扭矩
set date
Copyright © Infineon Technologies AG 2015. All rights reserved.
17
雨刮器的机械结构
set date
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18
雨刮器的改进
位置传感器
12V，48V ？
有刷或无刷电机
正反转控制
set date
Copyright © Infineon Technologies AG 2015. All rights reserved.
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