CN206850693U

CN206850693U - AC single speed motor-drive circuit for air cleaning unit

Info

Publication number: CN206850693U
Application number: CN201720584720.6U
Authority: CN
Inventors: 王军; 厉亚
Original assignee: Shanghai Xi Ding Information Technology Co Ltd
Current assignee: Shanghai Xi Ding Information Technology Co Ltd
Priority date: 2017-05-24
Filing date: 2017-05-24
Publication date: 2018-01-05
Anticipated expiration: 2027-05-24

Abstract

The utility model discloses a kind of AC single speed motor-drive circuit for air cleaning unit, including AC power, power-switching circuit and transformer, the power-switching circuit is used to AC power being converted into direct current and to microprocessor power supply, the microprocessor is used for control relay drive circuit, the transformer is used to change the voltage of AC power and electrically connected with switching device, the switching device is controlled by relay drive circuit, and the voltage after change is delivered to motor by the switching device.The utility model circuit structure is simple, component is few, control unit, electronic switch, multi-tap transformer alignment circuit are used as by microprocessor, multigroup output of transformer is alternatively introduced into motor, solve the problems, such as electric machine speed regulation and motor safety can be ensured, thus with it is simple in construction, cost is low, steady performance.

Description

AC single speed motor-drive circuit for air cleaning unit

Technical field

It the utility model is related to a kind of motor-drive circuit, particularly a kind of AC single speed electricity for air cleaning unit Drive circuit.

Background technology

Existing field of household appliances, many products such as air purifier, new blower fan, smoke exhaust ventilator all use AC single speed Motor, electric machine speed regulation are widely used.Conventional electric machine speed regulation scheme is to use voltage zero-cross detection signal, utilizes software Delays time to control turn on thyristors, its circuit structure are as shown in Figure 1.Although this method in the presence of certain technological deficiency, such as 1. because It is inductive load for motor, the phase shift of different degrees of current lagging voltage phase can be produced during startup, then produces zero point Drift, causes motor speed to drift about；2. drive circuit is complicated, circuit stability is not high, does not possess price advantage.

Fig. 2 gives the control circuit of another load motor, including：A pair of ac input ends, it is connected to list a pair The ac output end of cross streams motor and a pair of ac bus that ac input end is connected with ac output end one-to-one corresponding, Power supply master control switch is serially connected with the circuit of an ac bus therein, it is characterised in that described load motor Control circuit also includes：The controllable electronic switch being serially connected on the circuit of an ac bus therein；Start triggering circuit, It is the trigger signal for producing controllable electronic switch that it, which is acted on, so that controllable electronic switch is connected；Triggering keeps control circuit, and it is made With holding controllable electronic switch on-state.But the program can only controlled motor start and stop, also need to add in addition for speed governing Circuit is designed, causes type of drive complicated.

Utility model content

In view of the above-mentioned problems existing in the prior art, the purpose of this utility model is that providing a kind of purification of air that is used for fills The AC single speed motor-drive circuit put.

The technical solution of the utility model is：A kind of AC single speed motor-drive circuit for air cleaning unit, bag AC power, power-switching circuit and transformer are included, the power-switching circuit is used to AC power being converted into direct current simultaneously To microprocessor power supply, the microprocessor is used for control relay drive circuit, and the transformer is used to change AC power Voltage and electrically connected with switching device, the switching device is controlled by relay drive circuit, the switching device will change Voltage afterwards is delivered to motor.

Preferably, the transformer is multi-tap transformer, and each output end of the multi-tap transformer is respectively connected with Electronic switch, the electronic switch also electrically connect with motor, and the electronic switch drives its opening and closing by relay drive circuit.

Preferably, the transformer is provided with 5 road output voltages.

Preferably, base stage connection resistance RK1 of the relay drive circuit provided with triode QK1, the triode QK1 With resistance RK2 one end, the other end of the resistance RK1 and resistance RK2 connect the control terminal and ground terminal of microprocessor respectively, described Triode QK1 grounded emitter, the colelctor electrode connection electronic switch K1 of the triode QK1 No. 2 binding posts, the electricity The both ends of sub switch K1 No. 1 binding post and 2 binding posts distribution connection diode DK1.

Preferably, the triode QK1 uses 9013 type triodes, and the resistance of the resistance RK1 and resistance RK2 are respectively 4.7K and 10K, the diode DK1 use M7 type diodes.

In summary, the utility model has advantages below：

The utility model circuit structure is simple, component is few, is used as control unit, electronic switch, more by microprocessor Tapped transformer alignment circuit, multigroup output of transformer are alternatively introduced into motor, are solved the problems, such as electric machine speed regulation and can be protected Demonstrate,prove motor safety, therefore with it is simple in construction, cost is low, steady performance.

Brief description of the drawings

Fig. 1 is the circuit structure diagram of prior art；

Fig. 2 is the circuit structure diagram of another prior art；

Fig. 3 is the structured flowchart of the present embodiment；

Fig. 4 is that the motor of the present embodiment drives schematic diagram；

Fig. 5 is the drive circuit figure of relay.

Embodiment

The utility model is made further in detail, intactly to illustrate with reference to embodiment and accompanying drawing.

As in Figure 3-5, a kind of AC single speed motor-drive circuit for air cleaning unit, including AC power, Power-switching circuit and transformer, the power-switching circuit are used to AC power being converted into direct current and supplied to microprocessor Electricity, the microprocessor are used for control relay drive circuit, and the transformer is used to change the voltage of AC power and with cutting Changing device is electrically connected, and the switching device is controlled by relay drive circuit, and the switching device conveys the voltage after change To motor.

Especially as shown in figure 3, the transformer is multi-tap transformer, each output end of the multi-tap transformer is equal Electronic switch is connected with, the electronic switch also electrically connects with motor, and the electronic switch drives it by relay drive circuit Opening and closing.The transformer is provided with 5 road output voltages.

Base stage connection resistance RK1 and resistance of the relay drive circuit provided with triode QK1, the triode QK1 RK2 one end, the other end of the resistance RK1 and resistance RK2 connect the control terminal and ground terminal of microprocessor, the triode respectively QK1 grounded emitter, the colelctor electrode connection electronic switch K1 of the triode QK1 No. 2 binding posts, the electronic switch The both ends of K1 No. 1 binding post and 2 binding posts distribution connection diode DK1.

The triode QK1 uses 9013 type triodes, the resistance of the resistance RK1 and resistance RK2 be respectively 4.7K and 10K, the diode DK1 use M7 type diodes.

The operation principle of AC single speed unit is exactly to use the power on stator winding to produce magnetic field, and acts on rotor and formed and turned Square, mechanical energy is converted electrical energy into, allow rotor to rotate.The control mode of switching device can be used and combine tap transformation Device is by different control sources to motor internal, it is achieved thereby that the speed governing of motor.Specifically, transformer control single-speed motor master Will use N number of gear control, N number of tap is drawn by Circuit Fault on Secondary Transformer, out voltage be respectively AV, BV, CV....220V.It is also different according to the rotating speed of the different motors of output of voltage.Maximum voltage is the rated voltage of motor, is exported Power reaches maximum, and wind speed is also maximum.As Fig. 3 illustrates a kind of motor-drive circuit figure of 5 gear, K1~K10 in figure For electronic switch, it is controlled by microcontroller.K1~K5 difference controlled motors M1 5 grades of wind speed；K6~K10 distinguishes controlled motor M2 5 grades of wind speed.The output example of multi-tap transformer is 40VAC, 63VAC, 110VAC, 180VAC, 220VAC in example.

The utility model above-described embodiment is only to illustrate that technical solutions of the utility model are used simultaneously, only the utility model Technical scheme is enumerated, and is not limited to the technical solution of the utility model and its protection domain.Using equivalent technologies mean, The improvement to the technical scheme disclosed in the utility model claims book and specification such as equivalent apparatus, which is considered to be, not to be had Beyond the scope disclosed in the utility model claims book and specification.

Claims

1. the AC single speed motor-drive circuit for air cleaning unit, it is characterised in that including AC power, Power convert Circuit and transformer, the power-switching circuit is used to AC power being converted into direct current and to microprocessor power supply, described Microprocessor is used for control relay drive circuit, the transformer be used for the voltage for changing AC power and with switching device electricity Connection, the switching device are controlled by relay drive circuit, and the voltage after change is delivered to motor by the switching device.

2. it is used for the AC single speed motor-drive circuit of air cleaning unit as claimed in claim 1, it is characterised in that described Transformer is multi-tap transformer, and each output end of the multi-tap transformer is respectively connected with electronic switch, the electronic cutting Pass also electrically connects with motor, and the electronic switch drives its opening and closing by relay drive circuit.

3. it is used for the AC single speed motor-drive circuit of air cleaning unit as claimed in claim 2, it is characterised in that described Transformer is provided with 5 road output voltages.

4. it is used for the AC single speed motor-drive circuit of air cleaning unit as claimed in claim 2, it is characterised in that described Base stage connection resistance RK1 and resistance RK2 of the relay drive circuit provided with triode QK1, triode QK1 one end, institute The other end for stating resistance RK1 and resistance RK2 connects the control terminal and ground terminal of microprocessor, the emitter stage of the triode QK1 respectively Ground connection, the colelctor electrode connection electronic switch K1 of the triode QK1 No. 2 binding posts, No. 1 wiring of the electronic switch K1 The both ends of terminal and 2 binding posts distribution connection diode DK1.

5. it is used for the AC single speed motor-drive circuit of air cleaning unit as claimed in claim 4, it is characterised in that described Triode QK1 uses 9013 type triodes, and the resistance of the resistance RK1 and resistance RK2 is respectively 4.7K and 10K, two pole Pipe DK1 uses M7 type diodes.