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Motor drive control device and motor control method

A motor and drive signal technology, applied in the direction of controlling electromechanical transmission, starting device, motor generator control, etc., can solve the problems of inability to accurately detect the motor position, reduce the calculation accuracy, etc., so as to suppress the occurrence of the out-of-step state. , The effect of suppressing the rise of the inverter voltage

Inactive Publication Date: 2018-02-27
JAPAN SERVO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a normal observer-type sensorless drive control device, the accuracy of the estimation operation decreases when the motor stops or rotates at a low speed.
Therefore, it is impossible to accurately detect the position of the motor before starting to drive the motor

Method used

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  • Motor drive control device and motor control method
  • Motor drive control device and motor control method
  • Motor drive control device and motor control method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0022] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

[0023]

[0024] First, refer to figure 1 as well as figure 2 The configuration of the motor control device 1 will be described. figure 1 is a block diagram showing the configuration of the motor control device 1 . figure 2 It is a circuit diagram showing a schematic configuration of the inverter 2 and the voltage dividing circuit 12 of the motor control device 1 according to the present embodiment.

[0025] The motor control device 1 is a device that controls the drive of the motor 9 by supplying a drive current to the motor 9 . Such as figure 1 As shown, the motor control device 1 has a host controller 11 , a voltage dividing circuit 12 , an inverter 2 and a microcomputer 3 .

[0026] The host controller 11 is a device for inputting command signals such as operations such as start / stop of rotation of the motor 9 or a target rotational speed of the mo...

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Abstract

This motor drive control device has a sensorless drive processor and a rotation-state determination unit, the motor drive control device outputting a drive signal to a three-phase-voltage inverter forsupplying a drive current to a sensorless motor. In the motor drive control device, the sensorless drive processor carries out a sensorless drive process through closed-loop speed control on the basis of the voltage applied to a shunt resistor of an inverter. When the drive signal is not being outputted, the rotation-state determination unit determines the rotation state of the motor on the basisof the induced voltage of the motor. The sensorless drive processor initiates the sensorless drive process on the basis of the determination by the rotation-state determination unit. This makes it possible to output a suitable drive signal to the inverter in accordance with the rotation state of the motor. Therefore, it is possible to minimize any increase in the inverter voltage and any loss ofsynchronism, even when the motor has rotated due to external forces or the like prior to starting of the motor.

Description

technical field [0001] The invention relates to a motor drive control device and a motor control method. Background technique [0002] Conventionally, there is known a motor control device that performs sensorless drive processing without a sensor for detecting the position of a rotor of the motor in order to drive a brushless DC motor. In a typical observer-type sensorless drive control device, the accuracy of the estimation calculation decreases when the motor stops or rotates at a low speed. Therefore, it is impossible to accurately detect the position of the motor before starting to drive the motor. [0003] JP-A-2014-110675 describes a method of detecting the position of the motor when the motor is stopped in a motor control device that performs sensorless drive processing (paragraphs 0008 to 0010). If this method is used, the initial position before the motor rotates can be detected, so that the motor in the stopped state can be appropriately driven and controlled. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20H02P21/28H02P27/08
CPCH02P6/182H02P6/20H02P21/18H02P21/26H02P21/34H02P27/08H02P21/22H02P21/36
Inventor 石川理朋
Owner JAPAN SERVO CO LTD
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