CN105811815A - Pulse feedback output control method of BLDC motor and air conditioning system with application of method - Google Patents
Pulse feedback output control method of BLDC motor and air conditioning system with application of method Download PDFInfo
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Abstract
The present invention discloses a pulse feedback output control method of a BLDC motor and an air conditioning system with the application of the method. The air conditioning system comprises an air conditioning system controller and the BLDC motor. The air conditioning system controller is matched with the BLDC motor with 4 pairs of magnetic poles, and the FG feedback port of the motor is detected. The acquisition of 4 or 12 pulse signals from the FG port of the motor by the air conditioning system controller is regarded as the rotation of a rotor for one loop and time is recorded. 4 pairs of magnetic poles are employed by the BLDC motor, when the rotor is rotated for the arc of one pair of magnetic poles, and a motor operation parameter transmission unit sends A pulses to a microprocessor. The microprocessor detects pulse jump and measures the time t of adjacent pulse jump, and calculates the time T=t/m*(n*A) of converting an output pulse. The microprocessor configures a timer by using the time T. The timer controls the port FG to output a pulse by using the time T, and n is not equal to 4. The method and the system have the advantages of simple method, low cost, easy implementation, reliable working and development cost and time saving, and at the same time the advanced technology is used to reduce energy consumption and noise.
Description
Technical field:
The present invention relates to the air conditioning system of the pulse feedback output control method of a kind of BLDC motor and application thereof.
Background technology:
In recent years, along with appliance field competition, requiring to improve constantly to product technology, as required product energy-conserving and environment-protective, controllability intelligence degree is high, the construction cycle is short, noise is little.As core component motor, becoming the critical component solving above-mentioned technical problem, the commonly used load motor PSC of traditional motor inside domestic air conditioning, load motor undoubtedly, efficiency is low, compares power consumption, noise also big, and controllability degree of intelligence is low.Development along with motor technology, direct current generator replaces alternating current generator gradually, direct current generator is with electric machine controller, electric machine controller is utilized to realize the purpose of electronic commutation of electric current, so also someone is called for short ECM motor (electronicallycommutatedmotor) or is DC brushless motor (BLDCMOTOR) in industry, it has energy-conserving and environment-protective, reliability and controllability are all higher, noise is little, easily realize the features such as intelligent, the deficiency of load motor can be solved, therefore, load motor inside existing air-conditioning is taken replace by DC brushless motor and BLDC motor gradually.
China or other country's air-conditioning of Asia, the 5 road interfaces connecting formation standard of its BLDC motor and air conditioning system controller, as it is shown in figure 1, be respectively as follows: one to be connected to ground grounding ports GND, rotating speed input port VSP, DC bus-bar voltage input port Vdc, a low-voltage dc power supply input port Vcc and motor feedback port FG.
BLDC motor with ports having FG feedback pulse signal is that Japanese manufacturer does the earliest at home, originally they use 4 to magnetic pole BLDC motor, its structure is as shown in Figure 1, including stator 1 and rotor 2, stator 1 includes stator core 12 and the coil windings 11 being wound on stator core 12, permanent magnet on rotor 2 distributes alternately by N pole, S pole and forms 4 to magnetic pole, BLDC motor use three Hall elements or single or and sensor, each Hall element that turns of rotor just outputs 4 or 12 pulse signals of FG.Rotor is each to be turned port FG and feeds back 4 or 12 pulse signals have become industry standard, and air conditioning system controller is default.Innovate now with electromagnetic technique, the performance of 5 pairs of magnetic pole BLDC motors or other number of pole-pairs BLDC motor is more superior, but the port FG of 5 pairs of magnetic pole BLDC motors or other number of pole-pairs BLDC motor cannot export 4 or 12 pulses, therefore, a lot of air-conditioning factories are also unwilling to change oneself system and are suitable for the development of new motor technology.The 5 pairs of magnetic pole BLDC motor technologies causing advanced person cannot be promoted.
Summary of the invention:
It is an object of the invention to provide the pulse feedback output control method of a kind of BLDC motor, adopt the BLDC motor of non-4 pairs of magnetic poles, but can output 4 or 12 pulse signals at port FG, method is simple, and cost is low, it is easy to implement, reliable operation.
It is an object of the invention to provide air conditioning system, adopt the more superior 5 pairs of magnetic pole BLDC motors of performance or other number of pole-pairs BLDC motor, but port FG still exports 4 or 12 pulse signals, just can apply so that the air conditioning system controller of the BLDC motor of magnetic pole need not be done any amendment suitable in control 4, save development cost and time, the technology of advanced person can be utilized again simultaneously to reduce energy consumption and noise.
It is an object of the invention to be achieved by following technical proposals:
nullA kind of pulse feedback output control method of BLDC motor，Described BLDC motor includes electric machine controller and motor entity，Described motor entity includes stator module、Rotor assembly and case component，Stator module、Rotor assembly is arranged on inside case component，Stator module includes stator core and the coil windings being wound on stator core，Rotor assembly includes rotor core and is nested in the some permanent magnets inside rotor core，Some permanent magnets press N pole、S pole distributes alternately and forms n to magnetic pole，Described electric machine controller includes control circuit board，Control circuit board arranges microprocessor、Inverter circuit、Motor operating parameter detection unit，Motor service data is transferred to microprocessor by motor operating parameter detection unit，Output end of microprocessor connects the input of inverter circuit，The outfan of inverter circuit connects the coil windings being wound on stator core，Microprocessor passes through interface circuit at port FG output feedack umber of pulse m,Rotor often turns over radian motor operating parameter detection unit just A the pulse of conveying of 1 pair of magnetic pole to microprocessor，It is characterized in that: microprocessor detects impulse hits and measures the time t of adjacent pulse saltus step，Calculate time T=t/m × (n × A) of conversion output pulse，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse，Described n is not equal to 4.
Microprocessor described above is 4 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 1 pulse of conveying of 1 pair of magnetic pole to microprocessor.
Microprocessor described above is 12 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 3 pulses of conveying of 1 pair of magnetic pole to microprocessor.
Motor operating parameter detection unit described above is Hall element detecting element, and Hall element detecting element can adopt 3 Hall element detections or 1 Hall element detection.
Intervalometer described above is provided in the software timer inside microprocessor.
Intervalometer described above is the hardware timer controlled by microprocessor.
nullA kind of air conditioning system，Including air conditioning system controller and BLDC motor，Described air conditioning system controller obtains pulse feedback signal from the FG port of BLDC motor，When air conditioning system controller receives FG port m the pulse feedback signal of feedback of BLDC motor，Air conditioning system controller assert that rotor turns over a circle，Thus indirect calculation goes out the rotating speed of motor，Described BLDC motor includes electric machine controller and motor entity，Described motor entity includes stator module、Rotor assembly and case component，Stator module、Rotor assembly is arranged on inside case component，Stator module includes stator core and the coil windings being wound on stator core，Rotor assembly includes rotor core and is nested in the some permanent magnets inside rotor core，Some permanent magnets press N pole、S pole distributes alternately and forms n to magnetic pole，Described electric machine controller includes control circuit board，Control circuit board arranges microprocessor、Inverter circuit、Motor operating parameter detection unit，Motor service data is transferred to microprocessor by motor operating parameter detection unit，Output end of microprocessor connects the input of inverter circuit，The outfan of inverter circuit connects the coil windings being wound on stator core，Microprocessor passes through interface circuit at port FG output feedack umber of pulse m,Rotor often turns over radian motor operating parameter detection unit just A the pulse of conveying of 1 pair of magnetic pole to microprocessor，It is characterized in that: microprocessor detects impulse hits and measures the time t of adjacent pulse saltus step，Calculate time T=t/m × (n × A) of conversion output pulse，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse,Described n is not equal to 4，M=4 or m=12.
5 connectivity ports are had respectively: one is connected to ground earth terminal GND, rotating speed input port VSP, DC bus-bar voltage input port VDC, a low-voltage dc power supply input port VCC and motor feedback port FG between air conditioning system controller described above and BLDC motor.
Microprocessor described above is 4 by interface circuit in port FG output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 1 pulse of conveying of 1 pair of magnetic pole to microprocessor.
Microprocessor described above is 12 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 3 pulses of conveying of 1 pair of magnetic pole to microprocessor.
Motor operating parameter detection unit described above is Hall element detecting element, and Hall element detecting element can adopt 3 Hall element detections or 1 Hall element detection.
Intervalometer described above is provided in the software timer inside microprocessor.
Air conditioning system controller described above is that each port FG that turns of acquiescence rotor feeds back 4 or 12 pulse signals, and calculates motor speed with this.
The present invention compared with prior art has the advantage that 1) the non-4 pairs of magnetic pole Russia BLDC motors of employing of the present invention, but can at port FG 4 or 12 pulse signals outputed, microprocessor detects impulse hits and measures the time t of adjacent pulse saltus step, calculate time T=t/m × (n × A) of conversion output pulse, microprocessor utilizes time T to configure intervalometer, intervalometer utilizes time T to control port FG and exports pulse, described n × A is not equal to m, wherein n is magnetic pole logarithm, rotor often turns over radian motor operating parameter detection unit just A the pulse of conveying of 1 pair of magnetic pole to microprocessor, m is that requirement port FG exports umber of pulse, method is simple, cost is low, easily implement, reliable operation；2) intervalometer is provided in the software timer inside microprocessor, is implemented with by instruction cycles, simple and convenient, saves cost；3) air conditioning system of the present invention have employed the pulse feedback output control method of a kind of BLDC motor, adopt non-4 pairs of magnetic pole Russia BLDC motors, but 4 or 12 pulse signals can be outputed at port FG, adopt the more superior 5 pairs of magnetic pole BLDC motors of performance or other number of pole-pairs BLDC motor, but port FG still exports 4 or 12 pulse signals, just can apply so that the air conditioning system controller of the BLDC motor of magnetic pole need not be done any amendment suitable in control 4, save development cost and time, the technology of advanced person can be utilized again simultaneously to reduce energy consumption and noise.
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Accompanying drawing illustrates:
Fig. 1 is the connection diagram of existing air conditioning system and BLDC motor.
Fig. 2 is the structural representation of the BLDC motor of existing 4 pairs of magnetic poles.
Fig. 3 be the present invention structural representation.
Fig. 4 is the axonometric chart of the BLDC motor of non-4 pairs of magnetic poles of the present invention.
Fig. 5 is the axonometric chart of the controller of the BLDC motor of non-4 pairs of magnetic poles of the present invention.
Fig. 6 is the structure sectional view of the BLDC motor of non-4 pairs of magnetic poles of the present invention.
Fig. 7 is the circuit theory diagrams of the BLDC motor of non-4 pairs of magnetic poles of the present invention.
Fig. 8 is the schematic diagram of rotor 3 Halls of coupling of the BLDC motor of non-4 pairs of magnetic poles of the present invention.
Fig. 9 is the pulse diagram of the microprocessor detection of the BLDC motor of 5 pairs of magnetic poles of the present invention.
Figure 10 is the schematic diagram of rotor 1 Hall of coupling of the BLDC motor of non-4 pairs of magnetic poles of the present invention.
Pulse and the comparison figure of port FG output pulse are detected in the inside that Figure 11 is the BLDC motor of the present invention.
Detailed description of the invention:
Below by specific embodiment and in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, a kind of air conditioning system of the present invention includes air conditioning system controller and BLDC motor 10, the described air conditioning system controller coupling 4 BLDC motors to magnetic pole, namely the FG feedback port of motor is detected, when air conditioning system controller gets 4 or 12 pulse signals from the FG port of BLDC motor, it is considered as rotor rotation one enclose and record the time, thus calculating the actual speed of motor.nullDescribed BLDC motor 10 adopts non-4 pairs of magnetic poles，Described air conditioning system controller obtains pulse feedback signal from the FG port of the BLDC motor 10 of non-4 pairs of magnetic poles，When air conditioning system controller receives FG port m the pulse feedback signal of feedback of the BLDC motor 10 of non-4 pairs of magnetic poles，Air conditioning system controller assert that rotor turns over a circle，Thus indirect calculation goes out the rotating speed of motor，Described BLDC motor 10 includes electric machine controller 12 and motor entity 11，Described motor entity 11 includes stator module 112、Rotor assembly 113 and case component 111，Stator module 112、Rotor assembly 113 is arranged on inside case component 111，Stator module 112 includes stator core and the coil windings being wound on stator core，Rotor assembly 113 includes rotor core and is nested in the some permanent magnets inside rotor core，Some permanent magnets press N pole、S pole distributes alternately and forms n to magnetic pole，Described electric machine controller 12 includes control circuit board 121、Control box 122，Control circuit board 121 arranges microprocessor、Inverter circuit、Motor operating parameter detection unit，Motor service data is transferred to microprocessor by motor operating parameter detection unit，Output end of microprocessor connects the input of inverter circuit，The outfan of inverter circuit connects the coil windings being wound on stator core，Microprocessor passes through interface circuit at port FG output feedack umber of pulse m,Rotor often turns over radian motor operating parameter detection unit just A the pulse of conveying of 1 pair of magnetic pole to microprocessor，It is characterized in that: microprocessor detects impulse hits and measures the time t of adjacent pulse saltus step，Calculate time T=t/m × (n × A) of conversion output pulse，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse,Described n is not equal to 4，M=4 or m=12.As shown in figure 11, pulse and the comparison figure of port FG output pulse are detected in the inside of the BLDC motor of non-4 pairs of magnetic poles.
5 connectivity ports are had respectively: one is connected to ground earth terminal GND, rotating speed input port VSP, DC bus-bar voltage input port VDC, a low-voltage dc power supply input port VCC and motor feedback port FG between air conditioning system controller described above and BLDC motor.
Microprocessor described above is 4 by interface circuit in port FG output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 1 pulse of conveying of 1 pair of magnetic pole to microprocessor.
Microprocessor described above is 12 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 3 pulses of conveying of 1 pair of magnetic pole to microprocessor.
Motor operating parameter detection unit described above is Hall element detecting element, and Hall element detecting element can adopt 3 Hall element detections or 1 Hall element detection.
Intervalometer described above is provided in the software timer inside microprocessor.
Described air conditioning system controller described above is that each port FG that turns of acquiescence rotor feeds back 4 or 12 pulse signals, and calculates motor speed with this.
Specific embodiment one:
nullDescribed motor operating parameter detection unit is rotor position measurement circuit 114，Rotor position measurement circuit 114 includes 3 Hall element HALL，As shown in Figure 8，3 Hall element HALL are evenly distributed in the scope of a pair magnetic pole，Rotor assembly 113 often turns over the radian measure alpha of a magnetic pole，Just produce 3 pulse signals，Rotor assembly 113 shown in Fig. 8 has 5 pairs of magnetic poles，Rotor assembly 113 per revolution，Just 15 pulse signals of output，As shown in Figure 9，That is petty cannot mate and original control 4 air conditioning system controller to the BLDC motor of magnetic pole，Principles of the invention is: the pulse signal of 3 Hall element HALL feedbacks measured by microprocessor，By the time t of detection measurement adjacent pulse saltus step (as shown in figure 11,Can with rising edge for boundary)，
Going out to export time T=t/12 × (5 × 3) of pulse with regard to convertible, microprocessor utilizes time T to configure intervalometer, and intervalometer utilizes time T to control port FG and exports pulse.
Formula is obtained by: assume that mating original control 4 also uses 3 Hall element HALL to the BLDC motor of magnetic pole, so, when air conditioning system controller gets 12 pulse signals from the FG port of BLDC motor, is considered as rotor and rotates a circle；Radian 2 π/12 that so each pulse is corresponding, and radian 2 π/15 that each pulse of the BLDC motor of 5 pairs of magnetic poles is corresponding, when detecting the time t of adjacent pulse saltus step, it is possible to know the arc rotating speed V=2 π/15 ÷ t of rotor；And radian 2 π/12 that each pulse of BLDC motor of 4 pairs of magnetic poles is corresponding, then obtain output impulse hits time T=2 π/12 ÷ V；Arc rotating speed V is substituted into above-mentioned formula obtain: T=t/12 × (5 × 3)
Specific embodiment two:
nullDescribed motor operating parameter detection unit is rotor position measurement circuit 114，Rotor position measurement circuit 114 includes 1 Hall element HALL，As shown in Figure 10，1 Hall element HALL is evenly distributed in the scope of a pair magnetic pole，Rotor assembly 113 often turns over the radian measure alpha of a magnetic pole，Just produce 1 pulse signal，Rotor assembly 113 has 5 pairs of magnetic poles，Rotor assembly 113 per revolution，Just 5 pulse signals of output，That is petty cannot mate and original control 4 air conditioning system controller to the BLDC motor of magnetic pole，Principles of the invention is: the pulse signal of 1 Hall element HALL feedback measured by microprocessor，By detecting the time t (can with rising edge for boundary) measuring adjacent pulse saltus step，Go out to export time T=t/4 × (5 × 1) of pulse with regard to convertible，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse.
Formula is obtained by: assume that mating original control 4 also uses 1 Hall element HALL to the BLDC motor of magnetic pole, so, when air conditioning system controller gets 4 pulse signals from the FG port of BLDC motor, is considered as rotor and rotates a circle；Radian 2 π/4 that so each pulse is corresponding, and radian 2 π/5 that each pulse of the BLDC motor of 5 pairs of magnetic poles is corresponding, when detecting the time t of adjacent pulse saltus step, it is possible to know the arc rotating speed V=2 π/5 ÷ t of rotor；And radian 2 π/4 that each pulse of BLDC motor of magnetic pole is corresponding, then obtain output impulse hits T=2 π/4 ÷ V；Arc rotating speed V is substituted into above-mentioned formula obtain: T=t/4 × (5 × 1)
Specific embodiment three:
nullDescribed motor operating parameter detection unit is rotor position measurement circuit 114，Rotor position measurement circuit 114 includes 3 Hall element HALL，As shown in Figure 10，3 Hall element HALL are evenly distributed in the scope of a pair magnetic pole，Rotor assembly 113 often turns over the radian measure alpha of a magnetic pole，Just produce 3 pulse signals，Rotor assembly 113 has 6 pairs of magnetic poles，Rotor assembly 113 per revolution，Just 18 pulse signals of output，That is petty cannot mate and original control 4 air conditioning system controller to the BLDC motor of magnetic pole，Principles of the invention is: the pulse signal of 3 Hall element HALL feedbacks measured by microprocessor，By detecting the time t (can with rising edge for boundary) measuring adjacent pulse saltus step，Go out to export time T=t/12 × (6 × 3) of pulse with regard to convertible，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse.
Formula is obtained by: assume that mating original control 4 also uses 1 Hall element HALL to the BLDC motor of magnetic pole, so, when air conditioning system controller gets 12 pulse signals from the FG port of BLDC motor, is considered as rotor and rotates a circle；Radian 2 π/12 that so each pulse is corresponding, and radian 2 π/18 that each pulse of the BLDC motor of 6 pairs of magnetic poles is corresponding, when detecting the time t of adjacent pulse saltus step, it is possible to know the arc rotating speed V=2 π/18 ÷ t of rotor；And radian 2 π/12 that each pulse of BLDC motor of magnetic pole is corresponding, then obtain output impulse hits T=2 π/12 ÷ V；Arc rotating speed V is substituted into above-mentioned formula obtain: T=t/12 × (6 × 3).
Claims (13)
- null1. the pulse feedback output control method of a BLDC motor，Described BLDC motor includes electric machine controller and motor entity，Described motor entity includes stator module、Rotor assembly and case component，Stator module、Rotor assembly is arranged on inside case component，Stator module includes stator core and the coil windings being wound on stator core，Rotor assembly includes rotor core and is nested in the some permanent magnets inside rotor core，Some permanent magnets press N pole、S pole distributes alternately and forms n to magnetic pole，Described electric machine controller includes control circuit board，Control circuit board arranges microprocessor、Inverter circuit、Motor operating parameter detection unit，Motor service data is transferred to microprocessor by motor operating parameter detection unit，Output end of microprocessor connects the input of inverter circuit，The outfan of inverter circuit connects the coil windings being wound on stator core，Microprocessor passes through interface circuit at port FG output feedack umber of pulse m,Rotor often turns over the radian of 1 pair of magnetic pole，Just A the pulse of conveying of motor operating parameter detection unit is to microprocessor，It is characterized in that: microprocessor detects impulse hits and measures the time t of adjacent pulse saltus step，Calculate time T=t/m × (n × A) of conversion output pulse，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse，Described n is not equal to 4.
- 2. the pulse feedback output control method of a kind of BLDC motor according to claim 1, it is characterized in that: microprocessor is 4 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 1 pulse of conveying of 1 pair of magnetic pole to microprocessor.
- 3. the pulse feedback output control method of a kind of BLDC motor according to claim 1, it is characterized in that: microprocessor is 12 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 3 pulses of conveying of 1 pair of magnetic pole to microprocessor.
- 4. the pulse feedback output control method of a kind of BLDC motor according to claim 1, it is characterized in that: motor operating parameter detection unit is Hall element detecting element, Hall element detecting element can adopt 3 Hall element detections or 1 Hall element detection.
- 5. the pulse feedback output control method of a kind of BLDC motor according to claim 1 or 2 or 3 or 4, it is characterised in that: intervalometer is provided in the software timer inside microprocessor.
- 6. the pulse feedback output control method of a kind of BLDC motor according to claim 1 or 2 or 3 or 4, it is characterised in that: intervalometer is the hardware timer controlled by microprocessor.
- null7. an air conditioning system，Including air conditioning system controller and BLDC motor，Described air conditioning system controller obtains pulse feedback signal from the FG port of BLDC motor，When air conditioning system controller receives FG port m the pulse feedback signal of feedback of BLDC motor，Air conditioning system controller assert that rotor turns over a circle，Thus indirect calculation goes out the rotating speed of motor，Described BLDC motor includes electric machine controller and motor entity，Described motor entity includes stator module、Rotor assembly and case component，Stator module、Rotor assembly is arranged on inside case component，Stator module includes stator core and the coil windings being wound on stator core，Rotor assembly includes rotor core and is nested in the some permanent magnets inside rotor core，Some permanent magnets press N pole、S pole distributes alternately and forms n to magnetic pole，Described electric machine controller includes control circuit board，Control circuit board arranges microprocessor、Inverter circuit、Motor operating parameter detection unit，Motor service data is transferred to microprocessor by motor operating parameter detection unit，Output end of microprocessor connects the input of inverter circuit，The outfan of inverter circuit connects the coil windings being wound on stator core，Microprocessor passes through interface circuit at port FG output feedack umber of pulse m,Rotor often turns over radian motor operating parameter detection unit just A the pulse of conveying of 1 pair of magnetic pole to microprocessor，It is characterized in that: microprocessor detects impulse hits and measures the time t of adjacent pulse saltus step，Calculate time T=t/m × (n × A) of conversion output pulse，Microprocessor utilizes time T to configure intervalometer，Intervalometer utilizes time T to control port FG and exports pulse,Described n is not equal to 4，M=4 or m=12.
- 8. a kind of air conditioning system according to claim 7, it is characterised in that: there are 5 connectivity ports between air conditioning system controller and BLDC motor respectively: one is connected to ground earth terminal GND, rotating speed input port VSP, DC bus-bar voltage input port VDC, a low-voltage dc power supply input port VCC and motor feedback port FG.
- 9. a kind of air conditioning system according to claim 7, it is characterized in that: microprocessor is 4 by interface circuit in port FG output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 1 pulse of conveying of 1 pair of magnetic pole to microprocessor.
- 10. a kind of air conditioning system according to claim 7, it is characterized in that: microprocessor is 12 by interface circuit in FG port output feedack umber of pulse, some permanent magnets distribute alternately by N pole, S pole and form 5 to magnetic pole, and rotor often turns over radian motor operating parameter detection unit just 3 pulses of conveying of 1 pair of magnetic pole to microprocessor.
- 11. a kind of air conditioning system according to claim 7, it is characterised in that: motor operating parameter detection unit is Hall element detecting element, and Hall element detecting element can adopt 3 Hall element detections or 1 Hall element detection.
- 12. according to a kind of air conditioning system described in claim 7 or 8 or 9 or 10 or 11, it is characterised in that: intervalometer is provided in the software timer inside microprocessor.
- 13. a kind of air conditioning system according to claim 7 or 8, it is characterised in that: described air conditioning system controller is that each port FG that turns of acquiescence rotor feeds back 4 or 12 pulse signals, and calculates motor speed with this.
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