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Control unit for electric motor

A controller, motor technology, used in motor control, motor generator control, electric/electric converters, etc.

Active Publication Date: 2016-03-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dependent claims describe preferred embodiments

Method used

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  • Control unit for electric motor
  • Control unit for electric motor
  • Control unit for electric motor

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 A controller 100 for a motor 105 is shown. The controller 100 is designed to operate the electric motor 105 on a power supply network 110 as a function of control signals. An interface 115 may be provided for receiving control signals and, if applicable, for transmitting data back.

[0022] The controller 100 comprises a control unit 120 which, in the embodiment shown here, comprises a preferably digital processing unit 125 , in particular in the form of a programmable microcomputer, and a power circuit 130 . In addition to interface 115 , processing mechanism 125 may include a clock generator 135 for providing a constant clock signal, or a programmable counter or clock 140 . In one illustrated exemplary implementation, the processing mechanism 125 communicates the direction signal and pulse width modulated speed to the power circuit 130 to cause the desired rotational direction and speed of the electric motor 105 . In one embodiment, diagnostic information ...

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Abstract

A control unit for an electric motor comprises a protective circuit for limiting current or for polarity-reversal protection, the protective circuit comprising a field effect transistor having a gate. The protective circuit further comprises a control element for providing a control voltage for the gate, a smoothing capacitor for charge storage being provided on the gate.

Description

Background technique [0001] A number of different electric motors are installed on a motor vehicle. Such electric motors can drive, for example, valves, valves, pumps, ventilation devices, window lifters, seat adjustment devices, windshield wipers or other on-board components. The electric motor is equipped with a controller in order to control the direction of operation or the speed of rotation, for example, depending on the requirements present. Frequently, the controller comprises a programmable microcomputer with a data interface for exchanging control data. The microcomputer then controls the electric motor by means of the power circuit. [0002] To protect the controller, the motor, or the supply network on which the controller and motor operate from damage, the controller may include one or more protection circuits that limit or shut down the current. For example, if it is detected that the supply voltage to the controller or the motor has the wrong polarity, the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/02H02P29/024H02P29/032H02H7/08H02H11/00H02P1/00H02P7/29H02P31/00
CPCH02P29/032H02H7/0838H02H11/003H02P1/00H02P7/29H02P29/02H02P29/027H02P31/00H02P29/028
Inventor M·鲁梅尔M·韦伯M·福施特
Owner ROBERT BOSCH GMBH