CN201865949U - Closed-loop control device of revolving speed of air-conditioner fan - Google Patents
Closed-loop control device of revolving speed of air-conditioner fan Download PDFInfo
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- CN201865949U CN201865949U CN2010202765274U CN201020276527U CN201865949U CN 201865949 U CN201865949 U CN 201865949U CN 2010202765274 U CN2010202765274 U CN 2010202765274U CN 201020276527 U CN201020276527 U CN 201020276527U CN 201865949 U CN201865949 U CN 201865949U
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Abstract
The utility model discloses a closed-loop control device of revolving speed of an air-conditioner fan and relates to a control device of revolving speed of the air-conditioner fan. The existing control system is in open-loop control of the fan, and the revolving speed of the fan changes with the external factor, so that the comfort level is affected. In order to keep the constant wind speed, the user needs to ceaselessly adjust the setting value of the revolving speed of the fan, so that the device is troublesome to operate. The device comprises a revolving speed setting module for inputting the speed given by the user and a control module for controlling the revolving speed of the motor according to the given revolving speed, and is characterized in that: the control model is provided with a motor revolving speed feedback module. With the adoption of the technical scheme, the difference between the actual revolving speed and the set revolving speed of the fan is reduced, the revolving speed is prevented from being too fast or too slow, the setting value of the revolving speed of the fan does not need to be ceaselessly modified by man to meet the requirement of indoor comfort, the energy conservation is contributed, and the energy waste is prevented.
Description
Technical field
The utility model relates to a kind of air-conditioning draught fan revolution speed control device.
Background technique
One air-conditioning draught fan revolution speed control device comprises power circuit, central processing unit (CPU), speed setting circuit, drive circuit, power circuit, communicating circuit, protective circuit, storage unit composition.After passing through rectification module, active PFC circuit, filtration module successively after the power supply input; produce the busbar voltage of high pressure; this busbar voltage provides the bus power supply for power circuit on the one hand, on the other hand through providing low tension power supply for central processing unit (CPU), speed setting circuit, drive circuit, communicating circuit, protective circuit etc. after the DC-DC step-down.Its working procedure is: the user sets rotation speed of fan, generate in the speed setting circuit and setting rotating speed corresponding voltage value, central processing unit (CPU) is undertaken the voltage in the outside speed setting circuit to calculate the setting rotating speed after the sampling processing by the built-in analog-to-digital conversion module of central processing unit (CPU); After central processing unit (CPU) calculated by PID, producing suitable pwm signal influenced drive circuit, and the switching of power tube in the power controlling circuit, thereby the pwm signal of generation high pressure make motor according to specifying rotation speed operation.The air-conditioning draught fan speed closed loop does not have the position control storage unit and has preserved the control system relevant parameter.
Brushless DC motor control system is according to the PWM drive waveform motor rotation of the given speed controling signal output constant duty ratio of user, this way has been ignored the environment actual conditions, as: current whether in operation against the wind, whether current busbar voltage is voltage rating, if actual environment difference, even the output of identical pwm signal, the rotating speed of blower fan also is inequality.Because the blower fan of control system is open loop control, rotation speed of fan can change because of external factor, influences comfort level, and for keeping the constant of wind speed, the user needs constantly to adjust rotation speed of fan setting value, troublesome poeration.
The model utility content
The technical assignment of the technical problems to be solved in the utility model and proposition is that the prior art scheme is improved and improved, and provides a kind of air-conditioning draught fan speed closed loop control gear, to reach the purpose of automatic control.For this reason, the utility model is taked following technological scheme.
Air-conditioning draught fan speed closed loop control gear comprises the speed setting module that is used to import user's given rotating speed, the control module that is used for controlling according to given rotating speed motor speed, and it is characterized in that: described control module is provided with the motor speed feedback module.The motor actual speed is fed back to control module, and control module compensates according to actual speed and the difference of setting rotating speed, and the actual speed after stablizing is controlled within the specific limits.Reduce the blower fan actual speed and set the rotating speed deviation, avoid rotating speed too fast or low excessively, need not constantly the artificial rotation speed of fan setting value of revising, help energy-conservationly, prevent the waste of the energy to satisfy the indoor comfort degree requirement.
As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature.
Described motor speed feedback module comprises AD conversion unit, location recognition circuit and the feedback revolution speed calculating unit that is connected with the location recognition circuit by AD conversion unit, described location recognition circuit is connected with the motor three-phase electricity and is used to gather the three-phase counterelectromotive force, feedback revolution speed calculating unit is used for calculating the real electrical machinery rotating speed according to the three-phase counterelectromotive force, and described feedback revolution speed calculating unit is connected with the motor speed with reality with control module and feeds back to control module.The location recognition circuit detects sampling to motor three-phase counterelectromotive force in running, calculate the motor actual speed by feedback revolution speed calculating unit, realize location recognition with software, and do not use Hall transducer to discern the residing position of rotor, thereby, motor simple in structure, volume is little, cost is low, reliable, noise is little, high conformity, the air-conditioning draught fan of be fit to producing in enormous quantities.
Described control module comprises linking to each other with feedback revolution speed calculating unit and is used for relatively setting rotating speed and is connected with the comparing unit of actual speed value, with comparing unit and is used to redefine the speed setting unit that pulsewidth modulation (PWM) signal turns round with drive motor.The speed setting unit determines tentatively that according to the rotating speed of setting pulse-width signal makes motor rotation by drive circuit and power circuit, the use position recognition circuit is measured current rotating speed, more current rotating speed of comparing unit and setting rotating speed, get speed discrepancy, after PID calculating, the speed setting unit produces the switching of power tube in the suitable pwm signal controlling and driving circuit, thereby the control signal that produces high pressure makes motor rotation.
Described feedback revolution speed calculating unit, comparing unit, speed setting unit are arranged in same single-chip microcomputer.
Beneficial effect: set up the motor speed feedback module, the fan speed closed loop control feeds back to control module with the motor actual speed, and control module compensates according to actual speed and the difference of setting rotating speed, and the actual speed after stablizing is controlled in the setting range.Reduce the blower fan actual speed and set the rotating speed deviation, avoid rotating speed too fast or low excessively, need not constantly the artificial rotation speed of fan setting value of revising, help energy-conservationly, prevent the waste of the energy to satisfy the indoor comfort degree requirement.
2, adopt the location recognition circuit to realize the feedback of rotating speed, realize location recognition with software, and do not use Hall transducer to discern the residing position of rotor, thereby, motor simple in structure, volume is little, cost is low, reliable, noise is little, high conformity is fit to the air-conditioning draught fan of producing in enormous quantities.
Description of drawings
Fig. 1 is the utility model structure principle chart.
Embodiment
Below in conjunction with Figure of description the technical solution of the utility model is described in further detail.
As shown in Figure 1, the utility model comprises the speed setting module that is used to import user's given rotating speed, the control module that is used for controlling according to given rotating speed motor speed, and control module is provided with the motor speed feedback module.The motor speed feedback module comprises AD conversion unit, location recognition circuit and the feedback revolution speed calculating unit that is connected with the location recognition circuit by AD conversion unit, the location recognition circuit is connected with the motor three-phase electricity and is used to gather the three-phase counterelectromotive force, feedback revolution speed calculating unit is used for calculating the real electrical machinery rotating speed according to the three-phase counterelectromotive force, and feedback revolution speed calculating unit is connected with the motor speed with reality with control module and feeds back to control module.Control module comprises linking to each other with feedback revolution speed calculating unit and is used to set rotating speed and is connected with the comparing unit of actual speed comparison, with comparing unit and is used to redefine the speed setting unit that pulsewidth modulation (PWM) signal turns round with drive motor.Feedback revolution speed calculating unit, comparing unit, speed setting unit are located in the same single-chip microcomputer.
Working procedure: 1, the user sets the rotation speed of fan value as required; 2, produce in the speed setting circuit and setting rotation speed of fan value corresponding voltage value; 3, after the built-in analog-to-digital conversion module of single-chip microcomputer carried out sampling processing with the voltage in the speed setting circuit, the speed setting unit calculated the setting rotating speed; 4, calculate through PID, producing suitable pwm signal influences drive circuit, and the switching of power tube in the power controlling circuit, thereby the pwm signal of generation high pressure make motor according to specifying rotation speed operation; 5, the location recognition circuit is gathered motor three-phase counterelectromotive force; 6, the three-phase counterelectromotive force information of Cai Jiing is sent to feedback revolution speed calculating unit by analog-to-digital conversion module; 7, feedback revolution speed calculating unit draws the actual speed of motor, and delivers to comparing unit, carries out comparison, the compensation of rotating speed and calculates; 8, pulsewidth modulation (PWM) signal is adjusted with drive motor, repeating step 4 according to the rotating speed comparison value in the speed setting unit.
More than air-conditioning draught fan speed closed loop control gear shown in Figure 1 be specific embodiment of the utility model; the utility model substantive distinguishing features and progress have been embodied; can be according to the use needs of reality; under enlightenment of the present utility model; it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection domain of this programme.
Claims (4)
1. air-conditioning draught fan speed closed loop control gear comprises the speed setting module that is used to import user's given rotating speed, the control module that is used for controlling according to given rotating speed motor speed, and it is characterized in that: described control module is provided with the motor speed feedback module.
2. air-conditioning draught fan speed closed loop control gear according to claim 1, it is characterized in that: described motor speed feedback module comprises AD conversion unit, location recognition circuit and the feedback revolution speed calculating unit that is connected with the location recognition circuit by AD conversion unit, described location recognition circuit is connected with the motor three-phase electricity and is used to gather the three-phase counterelectromotive force, feedback revolution speed calculating unit is used for calculating the real electrical machinery rotating speed according to the three-phase counterelectromotive force, and described feedback revolution speed calculating unit is connected with the motor speed with reality with control module and feeds back to control module.
3. air-conditioning draught fan speed closed loop control gear according to claim 2 is characterized in that: described control module comprises linking to each other with feedback revolution speed calculating unit and is used for relatively setting rotating speed and is connected with the comparing unit of actual speed value, with comparing unit and is used for the speed setting unit that definite pulse-width modulation PWM signal turns round with drive motor.
4. air-conditioning draught fan speed closed loop control gear according to claim 3 is characterized in that: described feedback revolution speed calculating unit, comparing unit, speed setting unit are arranged in same single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202765274U CN201865949U (en) | 2010-07-30 | 2010-07-30 | Closed-loop control device of revolving speed of air-conditioner fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202765274U CN201865949U (en) | 2010-07-30 | 2010-07-30 | Closed-loop control device of revolving speed of air-conditioner fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201865949U true CN201865949U (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202765274U Expired - Fee Related CN201865949U (en) | 2010-07-30 | 2010-07-30 | Closed-loop control device of revolving speed of air-conditioner fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201865949U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828979A (en) * | 2012-08-24 | 2012-12-19 | 青岛海尔空调电子有限公司 | Fan control method for controlling wind speed and control device |
| CN104265669A (en) * | 2014-09-24 | 2015-01-07 | 合肥美的电冰箱有限公司 | Rotating speed control method and device of brushless DC fan, fan and refrigerator |
| CN104289489A (en) * | 2014-07-29 | 2015-01-21 | 江苏苏美达五金工具有限公司 | High-pressure washer driving system and method based on brushless direct current motor |
| CN106802552A (en) * | 2017-03-30 | 2017-06-06 | 北京新能源汽车股份有限公司 | Control method and device for automobile air conditioner motor and automobile |
-
2010
- 2010-07-30 CN CN2010202765274U patent/CN201865949U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828979A (en) * | 2012-08-24 | 2012-12-19 | 青岛海尔空调电子有限公司 | Fan control method for controlling wind speed and control device |
| CN102828979B (en) * | 2012-08-24 | 2016-07-06 | 青岛海尔空调电子有限公司 | A kind of with wind speed for controlling the blower control method of target and controlling device |
| CN104289489A (en) * | 2014-07-29 | 2015-01-21 | 江苏苏美达五金工具有限公司 | High-pressure washer driving system and method based on brushless direct current motor |
| CN104265669A (en) * | 2014-09-24 | 2015-01-07 | 合肥美的电冰箱有限公司 | Rotating speed control method and device of brushless DC fan, fan and refrigerator |
| CN106802552A (en) * | 2017-03-30 | 2017-06-06 | 北京新能源汽车股份有限公司 | Control method and device for automobile air conditioner motor and automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20180730 |