CN211606325U

CN211606325U - Anti-interference speed-regulating chip for shunt type ac motor

Info

Publication number: CN211606325U
Application number: CN201921808315.3U
Authority: CN
Inventors: 赖安谷
Original assignee: Zhongxin Chip Technology Nanjing Co ltd
Current assignee: Zhongxin Chip Technology Nanjing Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-09-29
Anticipated expiration: 2029-10-25

Abstract

The utility model provides an anti-interference speed governing chip of shunting AC motor includes the drive unit be connected with the motor, the reposition of redundant personnel unit be connected with the drive unit, with the reposition of redundant personnel unit of being connected, with the pulse wave modulation unit of step up unit and reposition of redundant personnel unit connection, with the control unit of pulse wave modulation unit connection, with the storage unit of control unit connection, with the sensing unit that the storage unit is connected, with the storage unit, the reposition of redundant personnel unit includes four group NMOS conduction tubes, the utility model discloses anti-interference speed governing chip of shunting AC motor integrates sensing unit, control unit, pulse wave modulation unit, the unit of stepping up and drive unit in an integrated circuit, makes it have the advantage that the circuit area is little and with low costs, avoids the harmonic that comes from the motor to produce the interference to the chip through anti-.

Description

Anti-interference speed-regulating chip for shunt type ac motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to a motor control chip field specifically is a shunting motor speed governing chip.

[ background of the invention ]

Although the motor heating generally does not affect the life of the motor, it can have some negative effects when it is severe. For example, the dynamic response of the motor is influenced by the change of structural stress and the small change of an internal air gap caused by the difference of thermal expansion coefficients of all parts in the motor, and the motor is easy to step out at high speed. And in some occasions, excessive heating of the motor is not allowed, such as medical instruments, high-precision testing equipment and the like. Although the heat dissipation can be accelerated by installing the heat dissipation fan, the chip circuit board itself reaches a temperature of more than 50 degrees, which leads to unstable operation, and in addition, harmonic waves are generated during the rotation of the motor to interfere with the normal operation of the chip.

Therefore, the problem that needs to be solved urgently in the field is to provide the anti-interference speed regulation chip of the shunt type alternating current motor with low heat generation.

[ Utility model ] content

To the above problem, the utility model discloses the anti-interference speed governing chip of shunting AC motor integrates sensing unit, the control unit, pulse wave modulation unit, the unit and the drive unit that steps up in an integrated circuit, makes it have the advantage that the circuit area is little and with low costs, avoids the harmonic that comes from the motor to produce the chip through anti-interference processing unit simultaneously and disturbs.

In order to solve the above problems, the anti-interference speed-adjusting chip of the shunting type ac motor of the present invention comprises a driving unit connected to the motor, a shunting unit connected to the driving unit, a boosting unit connected to the shunting unit, a pulse wave modulation unit connected to the boosting unit and the shunting unit, a control unit connected to the pulse wave modulation unit, a storage unit connected to the control unit, and a sensing unit connected to the storage unit, wherein the shunting unit comprises four sets of NMOS conducting tubes for adjusting the rotation speed of the motor by adjusting the magnitude of current, the boosting unit boosts the voltage and transmits the boosted voltage to the shunting unit, the shunting unit divides the current into four strands, multi-stage speed adjustment is realized by different combinations of current, an anti-interference processing unit is further connected between the driving unit and the motor, harmonics between the motor and the driving unit are suppressed by the anti-interference processing unit, and the impedance is increased, absorbing and weakening surge voltage and current near chip

Furthermore, the utility model discloses the anti-interference speed governing chip of shunting AC motor integrates sensing unit, the control unit, pulse wave modulation unit, the unit and the drive unit that steps up in an integrated circuit, makes it have the advantage that the circuit area is little and with low costs, avoids the harmonic that comes from the motor to produce the chip through anti-interference processing unit simultaneously and disturbs.

[ description of the drawings ]

Fig. 1 is a schematic structural view of the anti-interference speed-regulating chip of the shunt ac motor of the present invention.

Fig. 2 is the circuit schematic diagram in the anti-interference speed regulation chip of the shunting ac motor of the present invention.

Fig. 3 is a circuit diagram of an anti-interference processing unit in the prior art.

[ detailed description ] embodiments

The directional terms of the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are only used for explaining and explaining the present invention, but not for limiting the scope of the present invention.

Referring to fig. 1, the utility model discloses the anti-interference speed governing chip's of shunting alternating current motor component structure is given, it includes the drive unit who is connected with the motor, the reposition of redundant personnel unit of being connected with the drive unit, with the unit of stepping up that the reposition of redundant personnel unit is connected, with the pulse modulation unit of stepping up unit and reposition of redundant personnel unit connection, with the control unit of pulse modulation unit connection, with the storage unit of control unit connection, with the sensing unit of storage unit connection. The driving unit is internally provided with two H-bridge structure conduction tubes for pushing a single-phase motor to operate, the shunting unit comprises four groups of NMOS conduction tubes for adjusting the rotating speed of the motor by adjusting the current, the boosting unit boosts the voltage and then transmits the boosted voltage to the shunting unit, the shunting unit divides the current into four strands, multi-stage speed adjustment is realized by different current combinations, heat generation of a circuit board is reduced, the pulse wave modulation unit comprises a triangular wave generator and a comparator for generating modulation signals, the sensing unit is used for sensing the rotating speed and the position of a rotor of the motor, the control unit is an 8051 series single chip microcomputer, the storage unit is internally provided with a table look-up method and an algorithm, and the table look-up method comprises a plurality of rotating speed difference values and a plurality of control signals corresponding. In addition, an anti-interference processing unit is connected between the driving unit and the motor, harmonic waves between the motor and the driving unit are suppressed through the anti-interference processing unit, meanwhile, impedance is increased, and surge voltage and current near the weakening chip are absorbed.

The speed regulation mode is as follows: the motor control device comprises a motor, a sensing unit, a control unit, a pulse wave modulation unit and a voltage regulation unit, wherein the sensing unit is used for sensing the rotating speed and the position of a rotor of the motor and generating a sensing output signal containing an actual rotating speed, the control unit is used for receiving an input signal containing a target rotating speed and the sensing output signal containing the actual rotating speed, calculating a difference value between the target rotating speed and the actual rotating speed, looking up a corresponding control signal according to a difference value table, the pulse wave modulation unit is used for receiving the control signal and generating a modulation signal for regulating the voltage according to the control signal, and the pulse wave width of the. The voltage boosting unit receives the modulation signal and then changes the voltage according to the requirement of the modulation signal, and the rotating speed of the motor is adjusted by boosting and changing the current. The utility model discloses the anti-interference speed governing chip of shunting AC motor integrates sensing unit, the control unit, pulse wave modulation unit, the unit and the drive unit that steps up in an integrated circuit, makes it have the advantage that circuit area is little and with low costs, avoids the harmonic that comes from the motor to produce the chip through anti-interference processing unit simultaneously and disturbs.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An anti-interference speed regulation chip of a shunting type AC motor is characterized by comprising a driving unit connected with the motor, a shunting unit connected with the driving unit, a boosting unit connected with the shunting unit, a pulse wave modulation unit connected with the boosting unit and the shunting unit, a control unit connected with the pulse wave modulation unit, a storage unit connected with the control unit, and a sensing unit connected with the storage unit, wherein the shunting unit comprises four groups of NMOS (N-channel metal oxide semiconductor) conduction tubes which adjust the rotating speed of the motor by adjusting the magnitude of current, the boosting unit boosts the voltage and transmits the boosted voltage to the shunting unit, the shunting unit divides the current into four strands, multi-stage speed regulation is realized by different current combinations, an anti-interference processing unit is further connected between the driving unit and the motor, and harmonic waves between the motor and the driving unit are inhibited by the anti-interference processing unit, and simultaneously, the impedance is increased, and surge voltage and current near the chip are absorbed and weakened.