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Motor control device

A technology of motor control and control unit, which is applied in the direction of motor control, motor generator control, AC motor control, etc., and can solve problems such as heat generation and motor temperature rise

Active Publication Date: 2019-07-12
NIDEC TOSOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the technology disclosed in Japanese Laid-Open Patent Publication No. 2004-208409, although the power consumption of the motor can be limited by setting the step-up ratio of the voltage applied to the inverter circuit, the current is fixed, so Heat generation (so-called copper loss) caused by the resistance of the field coil of the motor causes the temperature of the motor to rise

Method used

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Embodiment Construction

[0023] Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

[0024] figure 1 It is a block diagram showing a configuration example of a motor control device according to an exemplary embodiment of the present invention.

[0025] The motor control device includes: a motor 1, which outputs driving force to the vehicle; a vehicle control unit (Vehicle Control Unit, VCU) 2, which outputs a torque command (torque indication value) according to the state of the vehicle; The torque command generates the driving voltage; the battery 4 provides the DC power supply voltage (V BATT ); the step-down DC-DC converter 5, which steps down the power supply voltage from the battery 4 according to the instruction from the inverter 3, and provides it to the inverter 3; and the temperature sensor 6, which detects the ambient temperature of the motor 1 or sets The temperature of the refrigerant cooled by the motor 1, etc. In...

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Abstract

The invention provides a motor control device capable of adjusting the temperature of a motor properly. The motor control device includes a temperature input unit that inputs a temperature of a motorand a control unit that performs control such that the control unit drives the motor by constant current / variable voltage control by lowering a power source voltage in a case in which the input temperature of the motor is equal to or less than a first threshold value and drives the motor by constant voltage / variable current control at a predetermined power source voltage in a case in which the temperature of the motor exceeds the first threshold value.

Description

technical field [0001] The present invention relates to a motor control device for driving and controlling a motor. Background technique [0002] A technique of controlling the drive power of a motor that powers a vehicle or the like using an inverter circuit is known. [0003] For example, Japanese Laid-Open Patent Application Publication No. 2004-208409 discloses a technology that has a DC-DC (DC-DC) that boosts a voltage from a power supply and applies it to an inverter circuit. ) The converter circuit sets a step-up ratio of a voltage applied to the inverter circuit based on information related to the amount of electric power consumed by the motor. [0004] However, in the technology disclosed in Japanese Laid-Open Patent Publication No. 2004-208409, although the power consumption of the motor can be limited by setting the step-up ratio of the voltage applied to the inverter circuit, the current is fixed, so The temperature of the motor rises due to heat generation (so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/16
CPCH02P6/08H02P6/16H02P29/64H02P2201/11H02P27/08
Inventor 初田匡之奥畑佳久
Owner NIDEC TOSOK CORP
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