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Motor control device, motor unit, and vehicle

A technology of motor control and control mode, which is applied in the direction of control devices, electrical devices, control drives, etc., and can solve problems such as fail-safe control not being executed

Pending Publication Date: 2022-03-15
NIDEC ELESYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if an abnormality occurs in the arithmetic processing unit, fail-safe control may not be executed

Method used

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  • Motor control device, motor unit, and vehicle
  • Motor control device, motor unit, and vehicle
  • Motor control device, motor unit, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

[0021] figure 1 It is a figure which schematically shows the structure of the vehicle 1 of this embodiment. For example, the vehicle 1 is an electric vehicle that travels with four wheels including two drive wheels 2 and two steering wheels (not shown). The vehicle 1 of the present embodiment has a vehicle speed sensor 3 , an accelerator position sensor (APS) 4 , an electronic control unit (ECU) 5 , a motor unit 6 , a high-voltage battery 7 and a low-voltage battery 8 .

[0022] The vehicle speed sensor 3 detects the speed of the vehicle 1 and outputs the detection result to the electronic control unit 5 as vehicle speed data. The accelerator position sensor 4 detects the depression amount of the accelerator pedal, and outputs the detection result to the electronic control unit 5 as accelerator position data.

[0023] The electronic control unit 5 contro...

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PUM

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Abstract

The invention provides a motor control device, a motor unit, and a vehicle. A motor control device according to one embodiment of the present invention is provided with: a motor drive circuit having an upper arm and a lower arm; an arithmetic processing device that controls the motor drive circuit; a replacement circuit that replaces the arithmetic processing device; and a mode switching unit that switches a control mode between a first control mode in which the motor drive circuit is controlled by the arithmetic processing device and a second control mode in which the motor drive circuit is controlled by the alternative circuit, in accordance with the state of the arithmetic processing device. When the state of the arithmetic processing device changes from the normal state to the abnormal state, the mode switching unit switches the control mode from the first control mode to the second control mode. In the second control mode, the replacement circuit controls the switching of the switching elements included in the upper and lower arms in accordance with the states of the upper and lower arms.

Description

technical field [0001] The invention relates to a motor control device, a motor unit and a vehicle. Background technique [0002] As a technique for protecting the inverter and the motor when an abnormality occurs in the inverter that drives the motor, there is known an active short circuit that controls all switching elements included in the upper arm or the lower arm of the inverter to be on. control (ASC control) and shutdown control (SD control) that controls all the switching elements of the inverter to be off. Hereinafter, ASC control and SD control are collectively referred to as fail-safe control. [0003] For example, Patent Document 1 discloses the following technology: In order to prevent the ASC control from being canceled due to the output current of the inverter momentarily exceeding the overcurrent threshold when performing ASC control, the overcurrent threshold is changed from the normal threshold to It is changed to a short-circuit control time threshold v...

Claims

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Application Information

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IPC IPC(8): H02P29/024H02P27/08H02P25/16B60L15/00
CPCH02P29/0241H02P27/08H02P25/16B60L15/00H02M7/53871H02M1/32H02P21/22B60L3/0084B60L3/003B60L2240/527B60L2240/12Y02T10/64Y02T10/72B60L15/20
Inventor 岩上直记高桥寿
Owner NIDEC ELESYS
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