Unlock instant, AI-driven research and patent intelligence for your innovation.

PG motor speed regulation system for air purifier

A technology for air purifiers and motor speed regulation, which is applied in control systems, AC motor control, electrical components, etc., and can solve problems such as transformer occupation, large space occupation, and audio noise

Active Publication Date: 2016-09-21
杭州翔泰电器有限公司
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the motors in the existing air purifiers use PG motors, which are usually realized by using a thyristor chopping sine wave for speed regulation. This speed regulation method has the following defects: 1. During the speed regulation process, with As the internal conduction angle changes, the input voltage sine wave is destroyed by the thyristor, thereby reducing the power factor value (PF), usually PF is lower than 0.5, and when the speed is adjusted, as the conduction angle becomes smaller, the power The factor value is getting lower and lower (1 / 4 sine wave is only 0.25); 2. The input voltage sine wave is destroyed, and the non-sinusoidal waveform increases the harmonic coefficient; 3. The input non-sinusoidal voltage waveform will be generated on the line Severe interference signal (EMI); 4. Inputting a non-sinusoidal voltage waveform will generate audio noise, which is often unacceptable
For the above a, the six-pin optocoupler is expensive and occupies a large space, so it cannot be used flexibly; for the above b, since the isolated +12V power supply is used as the driving power supply, it will occupy the space in the transformer. One output, which makes it necessary to choose a larger-sized transformer or make larger circuit changes to the transformer during manufacturing, which increases the cost of manufacturing and increases the complexity of the circuit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PG motor speed regulation system for air purifier
  • PG motor speed regulation system for air purifier
  • PG motor speed regulation system for air purifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 As shown, this embodiment provides an optocoupler power supply circuit for an air purifier, which includes:

[0049] Switching power supply, which is used to convert 220V AC power into 310V DC power and output it;

[0050] A switching transformer, which is used for voltage conversion of the 310V direct current provided by the switching power supply;

[0051]+5V output circuit, which is used to connect with the switching transformer through a secondary coil and output +5V direct current;

[0052] +12V output circuit, which is used to connect with the switching transformer through another secondary coil and output +12V direct current;

[0053] A feedback circuit, which is used to connect with the switching transformer through a detection coil, so as to detect the input voltage at the primary coil of the switching transformer and feed it back to the switching power supply, so as to realize the adjustment of the output voltage of the switching power suppl...

Embodiment 2

[0059] Such as figure 2 , image 3 As shown, this embodiment provides a motor speed regulation circuit for an air purifier, which includes a control unit, a first optocoupler, a second optocoupler, a first half-bridge drive circuit, a second half-bridge drive circuit, Bridge inverter circuit, DC power input unit and PG motor;

[0060] The control unit is used to generate a PWM control signal, the first optocoupler is used to receive the PWM control signal to drive the first half-bridge drive circuit, and the second optocoupler is used to receive the PWM control signal to drive the second half-bridge drive circuit ; The bridge inverter circuit includes 4 VMOS tubes, the first half-bridge drive circuit is used to drive and control the 2 VMOS tubes at one of the bridge arms, and the second half-bridge drive circuit is used to drive and control the 2 VMOS tubes at the other bridge arm. The two VMOS tubes are used for drive control; the DC power input unit is used to input DC po...

Embodiment 3

[0063] This embodiment provides a PG motor speed control system in an air cleaner, which includes:

[0064] Switching power supply, which is used to convert 220V AC power into 310V DC power and output it;

[0065] A switching transformer, which is used for voltage conversion of the 310V direct current provided by the switching power supply;

[0066] +5V output circuit, which is used to connect with the switching transformer through a secondary coil and output +5V direct current;

[0067] +12V output circuit, which is used to connect with the switching transformer through another secondary coil and output +12V direct current;

[0068] A feedback circuit, which is used to connect with the switching transformer through a detection coil, so as to detect the input voltage at the primary coil of the switching transformer and feed it back to the switching power supply, so as to realize the adjustment of the output voltage of the switching power supply;

[0069] an optocoupler power...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of an air purifier and specifically to a PG motor speed regulation system for an air purifier. The PG motor speed regulations stem comprises a switching power supply, a switching transformer, a plus 5V output circuit, a plus 12V output circuit, a feedback circuit, an optical coupling power supply circuit and an optical coupler, wherein the optical coupler comprises a first optical coupler and a second optical coupler; the first optical coupler and the second optical coupler both adopt an optical coupling driving voltage as the driving power supply; a control unit is arranged at the optical coupling input end; a silicon controlled rectifier circuit is arranged at the optical coupling output end; the silicon controlled rectifier circuit comprises a first half-bridge driving circuit connected with the first optical coupling output end, a second half-bridge driving circuit connected with the second optical coupling output end, and a bridge type inversion circuit; the input end of the bridge type inversion circuit is connected with a direct current power supply input unit; and the output end of the bridge type inversion circuit is connected with the PG motor. By adoption of the PG motor speed regulation system, the rotary speed regulation of the PG motor can be well realized.

Description

technical field [0001] The invention relates to the technical field of air purifiers, in particular to a PG motor speed regulating system in an air purifier. Background technique [0002] The motor is an important component in the air purifier. In order to enable the air purifier to work in multiple modes, the speed of the motor needs to be adjusted. Most of the motors in the existing air purifiers use PG motors, which are usually realized by using a thyristor chopping sine wave for speed regulation. This speed regulation method has the following defects: 1. During the speed regulation process, with As the internal conduction angle changes, the input voltage sine wave is destroyed by the thyristor, thereby reducing the power factor value (PF), usually PF is lower than 0.5, and when the speed is adjusted, as the conduction angle becomes smaller, the power The factor value is getting lower and lower (1 / 4 sine wave is only 0.25); 2. The input voltage sine wave is destroyed, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/092H02P27/08
CPCH02M1/092H02P27/08
Inventor 徐涵婷徐永根
Owner 杭州翔泰电器有限公司