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motor control unit

A technology of motor control and control unit, which is applied in the direction of control devices, motor generator control, and electrical devices, etc., which can solve the problems of torque control accuracy reduction and achieve the effect of high-precision torque control

Inactive Publication Date: 2017-02-15
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the motor control device described in Patent Document 1, there is no concern about the setting error of the motor constant, etc.
If there is a setting error of the motor constant, the accuracy of torque control will decrease by the amount corresponding to the error

Method used

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Embodiment Construction

[0068] Next, use Figure 1 to Figure 6 The configuration and operation of the motor control device according to the first embodiment of the present invention will be described.

[0069] First, use figure 1 The configuration of a motor drive system using the motor control device of this embodiment will be described.

[0070] figure 1 The configuration of a motor drive system using the motor control device according to the first embodiment of the present invention will be described.

[0071] The motor drive system of the present embodiment is composed of a motor control device 100 , a power inverter INV, a permanent magnet synchronous motor (PM motor; AC motor) MOT, and a torque command setting unit TS.

[0072] A permanent magnet synchronous motor (PM motor; AC motor) MOT is composed of a rotor having permanent magnets and field coils, and a stator having armature coils. The permanent magnet synchronous motor MOT outputs a torque that synthesizes a torque component due to t...

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Abstract

The present invention provides a motor control device capable of performing high-precision torque control by including a setting error of a motor constant and compensating for it. The motor control device 100 has a control unit that controls the motor MOT so that the current command value obtained from the torque command value for the motor MOT matches the current detection value for the current supplied to the motor MOT via the power inverter INV. supplied current. The control unit estimates the torque output by the motor, and controls the current supplied to the motor so that the estimated torque value of the motor matches the torque command value. The torque estimation computing unit 120 estimates the torque output by the motor. The phase error command calculation unit 125 calculates the command value of the phase error from the deviation between the torque estimated value and the torque command value. The speed estimation calculation unit 150 outputs the speed estimation value so that the phase error estimation value coincides with the phase error command value.

Description

technical field [0001] The present invention relates to a motor control device and an operating machine using the motor control device, in particular to a motor control device suitable for torque control of a permanent magnet synchronous motor and an operating machine using the motor control device. Background technique [0002] Conventionally, among the motor control devices that perform torque control, there is known a device that has a motor constant calculation unit that calculates the electric constant of the motor, and uses one of two orthogonal axes (d-axis and q-axis) The setting value of the electrical constant defined by the axis is corrected by using the relational expression of the state variable defined by the same axis, and by using the relational expression of the state variable defined by the other axis (For example, refer to Patent Document 1). [0003] According to the above aspect, the electrical constant of the permanent magnet synchronous motor can be s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/20
CPCB60L15/20B60L2200/40B60L2240/421B60L2260/44B60L3/003B60L7/14B60L15/2009B60L2200/42B60L2210/40B60L2220/14B60L2240/12B60L2240/423B60L2240/441B60L2240/443H02P21/18H02P21/20Y02T10/64Y02T10/72Y02T10/70
Inventor 户张和明关根和也
Owner NIHON KENKI CO LTD
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