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Control device for three-phase rotary motor

A technology for rotating electrical machines and control devices, which is applied in AC motor control, torque ripple control, control systems, etc., and can solve problems such as reduced rotational fluctuation tolerance and reduced control stability.

Inactive Publication Date: 2016-08-10
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the frequency of position detection becomes low, the tolerance to rotation fluctuations may decrease, resulting in a decrease in control stability.

Method used

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  • Control device for three-phase rotary motor
  • Control device for three-phase rotary motor
  • Control device for three-phase rotary motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] Hereinafter, a first embodiment of the control device for a three-phase rotating electric machine of the present invention will be described with reference to the drawings.

[0040] in figure 1 The system configuration of this embodiment is shown in. figure 1 The motor 10 shown is a surface permanent magnet synchronous motor (SPMSM). In addition, the electric motor 10 is obtained by Y-connecting three stator coils. The electric motor 10 is built in an oil pump 12 that discharges oil to a CVT (Continuously Variable Transmission) 14 provided in the drive system of the vehicle. A battery (direct current voltage source) 16 is connected to the electric motor 10 via an inverter INV. The inverter INV is a circuit that opens and closes the voltage source terminals on the high voltage side and the voltage source terminals on the low voltage side of the battery 16 and each of the three winding terminals of the motor 10. In addition, the winding terminal is a terminal that specifie...

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PUM

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Abstract

The invention provides a control device for a three-phase rotary motor, which can appropriately suppress decrease in tolerance to rotation variation and ensure the overlapping amount. The control device is powered on at 120 degrees in a first mode, and executes sensorless control during zero-cross timing of monitored induced voltage (e $) in monitoring of the induced voltage (e $ ($ = u, v, w)); the control device is powered on at 130-140 degrees in a second mode and executes sensorless control during zero-cross timing of monitored induced voltage (e $) in monitoring of the induced voltage (e $ ($ = u, v, w)); and in the condition that the absolute value of the rotation angular acceleration is less than a threshold, the control device switches from the second mode to the first mode.

Description

[0001] The entire contents of Japanese Patent Application No. 2015-020054 (application date: February 4, 2015), including the specification, drawings, and abstract of the specification, are incorporated herein by reference. Technical field [0002] The present invention relates to a control device for a three-phase rotating electric machine that controls a control amount of the three-phase rotating electric machine by operating an inverter. Background technique [0003] For example, in Japanese Patent Application Laid-Open No. 2010-252406, a sensorless processing device is proposed. The sensorless processing device is capable of detecting the induced voltage based on the terminal voltage in a region where the rotation speed of a three-phase rotating electrical machine is low. The amount of overlap performs rectangular wave energization, and increases the amount of overlap in an area where the rotation speed is high. Here, when the overlap amount is increased, the induced voltage c...

Claims

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Application Information

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IPC IPC(8): H02P6/10H02P27/08
CPCH02P6/10H02P27/085
Inventor 香川弘毅
Owner JTEKT CORP