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Motor drive device

A driving device and motor technology, which is applied in the direction of controlling electromechanical transmission, suppressing motor vibration control, motor generator control, etc., can solve the problems of motor current deformation, abnormal noise of torque fluctuation, etc., and achieve the suppression of torque fluctuation or abnormal noise Effect

Inactive Publication Date: 2011-09-28
OMRON AUTOMOTIVE ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in such Image 6 In the conventional motor drive device 500 shown, since the motor current is deformed by adding a dead time to the PWM signal, there is a problem that torque ripple and abnormal noise are generated.

Method used

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Embodiment Construction

[0057] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0058] First, refer to figure 1 The configuration of the motor drive device 100 according to one embodiment of the present invention will be described.

[0059] Such as figure 1 As shown, the motor drive device 100 of the present embodiment includes an inverter 1 that drives a motor 150 and a control unit 2 that controls the inverter 1 . The motor 150 is, for example, a three-phase brushless motor used in an electric power steering device of a vehicle. In addition, the inverter 1 is an example of the "drive circuit" of the present invention.

[0060] Such as figure 2 As shown, the inverter 1 is composed of a three-phase bridge in which three sets of upper and lower pairs of arms are provided corresponding to the U phase, the V phase, and the W phase. U-phase upper arm 11a has switching element 11b, U-phase lower arm 12a has switching element 12b, V-phase upper a...

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PUM

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Abstract

The invention provides a motor drive device (100) capable of suppressing generation of torque ripple and abnormal noise even if a motor (150) rotates at high speed. The motor drive device (100) comprises an inverter (1), and a control section (2) for controlling the inverter (1). The control section (2) comprises a current command value calculation unit (21) for calculating a current command value, a rotation calculation unit (22) for calculating a rotation angle theta and an angular speed omega of the motor (150), a drive signal generation unit (24) for generating a PWM signal, a correction signal generation unit (25) for generating a correction signal for correcting the PWM signal to compensate for the dead time of the inverter, and an application current setting unit (27) for adding a dead time to the PWM signal corrected by the correction signal and outputting the resulting signal to the inverter (1). The correction signal generation unit (25) generates the correction signal based on the current command value and the rotation angle theta and the angular speed omega calculated by the rotation calculation unit (22).

Description

technical field [0001] The present invention relates to a motor drive device including a drive circuit for driving a motor and a control unit for controlling the drive circuit. Background technique [0002] It is known in the past that there is a Figure 6 The illustrated motor drive device 500 includes an inverter 510 that drives a motor 550 and a control unit 520 that controls the inverter 510 . The motor 550 is, for example, a three-phase brushless motor. [0003] Such as Figure 7 As shown, the inverter 510 is constituted by a three-phase bridge in which three sets of upper and lower pairs of arms are provided corresponding to the U phase, the V phase, and the W phase. The U-phase upper arm 511a has a switching element 511b, and the U-phase lower arm 512a has a switching element 512b. The V-phase upper arm 513a has a switching element 513b, and the V-phase lower arm 514a has a switching element 514b. The W-phase upper arm 515a has a switching element 515b, and the W-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P6/10H02P6/06H02P6/08H02P6/17H02P6/28H02P21/00H02P21/05H02P21/22H02P23/04H02P27/04H02P27/08
CPCH02P27/08H02P21/05H02P27/04H02P21/00H02M7/48
Inventor 薮口教定
Owner OMRON AUTOMOTIVE ELECTRONICS CO LTD