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motor drive

A technology of motor driving and driving motors, which is applied in starter parts, AC motor control, single motor speed/torque control, etc. It can solve the problem of voltage signal resolution degradation, different input voltage ranges, and inability to use drive IC input voltage Range and other issues, to achieve the effect of suppressing the decline in resolution

Inactive Publication Date: 2018-09-11
NIDEC TECHNO MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the driver IC and microprocessor are configured independently, the output voltage range of the microprocessor may differ from the input voltage range of the driver IC.
At this time, if the voltage signal output from the microprocessor is directly input to the driver IC, the entire input voltage range of the driver IC cannot be used, and the motor operation is limited.
Especially when the upper limit and lower limit of the output voltage range of the microprocessor are different from the upper limit and lower limit of the input voltage of the driver IC, only the multiplier of the output voltage of the microprocessor is adjusted, and the voltage signal resolution will drop

Method used

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Embodiment Construction

[0029] Exemplary embodiments of the present invention will be described below with reference to the drawings.

[0030] 1-1. The overall structure of the motor drive unit

[0031] First, the overall structure of the motor drive device 1 will be described. figure 1 It is a block diagram conceptually showing the configuration of the motor drive device 1 . figure 2 is a circuit diagram of the command voltage adjustment circuit 4 . The motor drive device 1 is a device for driving the motor 9 by supplying a drive current to the motor 9 .

[0032] In one embodiment of the present invention, the motor 9 to be driven by the motor drive device 1 is a three-phase brushless DC motor. The motor 9 has stator windings for each of U-phase, V-phase, and W-phase. When a drive current is supplied to the stator windings of each phase, torque is generated between the stator and the rotor, and the rotor is driven to rotate. However, the motor to be driven by the motor drive device according t...

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Abstract

A motor driving device includes a microcomputer, a command voltage adjusting circuit, and a driving IC. The command voltage adjusting circuit converts a first command voltage signal from the microcomputer to a second command voltage signal. The driving IC generates a drive pulse based on the second command voltage signal. An upper and a lower limit of an input voltage range of the driving IC are larger than an upper and a lower limit of a voltage range of the first command voltage signal, respectively.

Description

technical field [0001] The invention relates to a motor drive device. Background technique [0002] Conventionally, there is known a motor drive device that includes a microprocessor including a CPU, a drive IC that generates a drive pulse based on a signal from the CPU, and an inverter that supplies a drive current to a motor based on the drive pulse from the drive IC. [0003] A motor control system in a conventional motor drive device is described in, for example, Japanese Laid-Open Publication No. 2010-22150. In the motor control system disclosed in Japanese Laid-Open Publication No. 2010-22150, a PWM signal output unit corresponding to a drive IC is mounted on the same chip as a microprocessor including a CPU. (paragraphs 0009,0014). [0004] As shown in the motor control system described in Japanese Laid-Open Publication No. 2010-22150, when the driver IC and the microprocessor are mounted on the same chip, if various modifications are made according to the type and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/04H02M7/48H02P6/06H02P6/08
CPCH02P1/04H02P23/00
Inventor 水上浩二下防浩通
Owner NIDEC TECHNO MOTOR CORP