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motor unit

A technology of motors and DC motors, applied in electrical components, single motor speed/torque control, electromechanical devices, etc., can solve the problems of increasing the cost and size of AC/DC converters

Active Publication Date: 2016-03-02
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the provided power is DC, it will increase the cost and size of the corresponding AC / DC converter

Method used

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no. 1 approach ）

[0017]

[0018] figure 1 It is a block diagram of the motor unit 1 concerning 1st Embodiment of this invention.

[0019] Such as figure 1 As shown, the motor unit 1 includes a motor part 10 and a converter part 20 .

[0020] The motor unit 10 includes a brushless DC motor (hereinafter referred to as “motor”) 11 , an inverter circuit 12 , an inverter drive circuit 13 , and a position sensor 14 . The inverter circuit 12 supplies drive current to the motor 11 . The inverter drive circuit 13 supplies drive pulse signals to the inverter circuit 12 . The motor section 10 includes a rotor and a stator. The rotor includes a rotating shaft, a rotor core, and magnets. The stator includes a stator core, coils, and the like. The motor unit 10 has a circuit board. The inverter circuit 12, the inverter drive circuit 13, and the position sensor 14 are arranged on the circuit board. The motor unit 10 includes input terminals 15 , 16 , and 17 , an output terminal 18 , and a ground te...

no. 2 approach ）

[0062] image 3 It is a block diagram of the motor unit 1 concerning 2nd Embodiment of this invention.

[0063] Such as image 3 As shown, the motor unit 1 according to this embodiment is figure 1 The converter part 20 of the motor unit 1 shown is provided with a second parallel resistor 61 .

[0064] One end of the second parallel resistor 61 is connected to the first parallel resistor 60 through the ground terminals 19 and 29 . The other end of the second parallel resistor 61 is connected to the microcontroller 22 . The converter unit 20 has lead wires. One end of the wire is connected to the node between the ground terminal 29 and the second parallel resistor 61 . The other end of the wire is connected to the microcontroller 22 .

[0065] The microcontroller 22 detects the terminal voltage of the second parallel resistor 61, and calculates the current value according to Ohm's law. The microcontroller 22 compares the calculated current value with a predetermined curre...

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PUM

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Abstract

The present invention provides a motor unit including a motor part and a converter part. The motor section includes a brushless DC motor, an inverter circuit, and an inverter drive circuit. The inverter circuit supplies drive current to the brushless DC motor. The inverter drive circuit provides drive pulse signals to the inverter circuit. The converter unit is connected to the motor unit. The converter section includes AC / DC converters and microcontrollers. The AC / DC converter converts an externally supplied AC voltage into a DC voltage supplied to the motor unit. The microcontroller receives digital control signals and outputs analog control signals. The inverter drive circuit receives the analog control signal output from the microcontroller, and outputs a drive pulse signal supplied to the inverter circuit.

Description

technical field [0001] The invention relates to a motor unit. Background technique [0002] Generally speaking, in order to drive a brushless DC motor (hereinafter referred to as "motor") with AC power, an AC / DC (alternating current / direct current) converter that converts alternating current to direct current is required. The direct current output from the AC / DC converter is converted into a three-phase drive current by the inverter circuit, and the motor is rotated by supplying the drive current to the motor. [0003] The AC / DC converter may be provided outside the motor, or may be built in the motor. Since external electric power is often supplied by alternating current, a motor capable of rotating by supplying alternating current is preferable. [0004] When it is preferable to supply electric power by AC, as described above, it is necessary to incorporate an AC / DC converter in the motor. However, in applications where electric power can be supplied in direct current, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08H02P6/16H02P29/02H02H7/08H02K5/04H02K5/22H02K11/33H02K11/35H02P6/06
CPCH02K5/00H02P4/00H02P6/00H02P6/085H02P29/027H02K11/00H02P6/32
Inventor 下防浩通
Owner NIDEC CORP