CN202475346U

CN202475346U - Low-power direct-current brushless single-phase motor controller

Info

Publication number: CN202475346U
Application number: CN2012200761174U
Authority: CN
Inventors: 刘立明; 陈云生
Original assignee: Zhongshan Broad Ocean Motor Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2012-10-03
Anticipated expiration: 2022-03-02
Also published as: WO2013127178A1

Abstract

The utility model discloses a low-power direct-current brushless single-phase motor controller, which comprises a Hall sensor detection module (1) and a full-bridge driving circuit (4), wherein four output ends of the full-bridge driving circuit (4) are connected with windings of the motor. The low-power direct-current brushless single-phase motor controller is characterized by also comprising a signal shaping circuit (2) and two paths of interlocking comparators (3) with dead time, wherein square wave signals output from the Hall sensor detection module (1) are processed by the signal shaping circuit (2) to form trapezoidal wave signals; and the trapezoidal wave signals are input to the two paths of interlocking comparators (3) with the dead time to be processed to form two paths of square wave signals with dead time (T) which are input to two input ends of the full-bridge driving circuit (4). The low-power direct-current brushless single-phase motor controller is simple in circuit structure, low in cost and stable and reliable in operation, and can simultaneously generate two paths of complementary differential signals with dead time which are input into the full-bridge driving circuit, thereby avoiding the straight communication between upper and lower bridge arms, and further preventing a driving switching tube from being burn by overcurrent.

Description

A kind of low power brush DC monophase machine controller

Technical field:

The utility model relates to a kind of low power brush DC monophase machine controller.

Background technology:

Traditional low power brush DC monophase machine controller adopts the integrated chip control circuit more and drives the cost height with full bridge driving circuit; Some adopt the brush DC monophase machine controller of discrete component; Though cost is low, can not form the complementary differential wave that has Dead Time of two-way homophase, cause upper and lower bridge arm straight-through; The overcurrent of driving switch pipe burns, and breaks down easily and unstable reliable.

Summary of the invention:

A purpose of the utility model provides a kind of low power brush DC monophase machine controller; Its circuit structure is simple; Cost is low, can produce the complementary differential wave that has Dead Time of two-way simultaneously and be input to full bridge driving circuit, avoids upper and lower bridge arm straight-through; The overcurrent that prevents the driving switch pipe burns, and working stability is reliable.

The utility model is achieved through following technical proposals:

A kind of low power brush DC monophase machine controller; Comprise Hall element detection module and full bridge driving circuit; 4 outputs of full bridge driving circuit are connected with the winding of motor; It comprises that also signal transformation circuit and two-way have the interlocking comparator of Dead Time in addition; The square-wave signal of Hall element detection module output is handled through signal transformation circuit and is formed trapezoidal wave signal, and trapezoidal wave signal is input to the interlocking comparator processing that two-way has Dead Time, forms two inputs that two-way has the square-wave signal of Dead Time T and is input to full bridge driving circuit.

The interlocking comparator that above-mentioned described two-way has Dead Time comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, comparator IC1A and comparator IC1B; Resistance R 7, two ends, resistance R 8 series connection back connect power vd D and ground respectively; Resistance R 9 connects power vd D and ground respectively with two ends, resistance R 10 series connection back, and comparator IC1A negative input end is connected between resistance R 7, the resistance R 8; The positive input terminal of comparator IC1B is connected between resistance R 9 and the resistance R 10, the negative input end of trapezoidal wave signal difference input comparator IC1A positive input terminal and comparator IC1B.

Thereby the resistance value ratio of above-mentioned described adjusting resistance R 7, resistance R 8 is regulated the reference voltage V1 of comparator IC1A negative input end; Thereby the reference voltage V2 of the positive input terminal of the resistance value ratio comparator IC1B of adjusting resistance R 9 and resistance R 10, Dead Time T is regulated by reference voltage V1 and reference voltage V2.

Above-mentioned described signal transformation circuit is the RC circuit, comprises resistance R 19 and capacitor C 4.

Above-mentioned described Hall element detection module is integrated IC chip.

The utility model compared with prior art; Have following effect: 1) the utility model adopts the discrete component form, and circuit structure is simple, and cost is low; The interlocking comparator that two-way has Dead Time can produce the complementary differential wave that has Dead Time of two-way simultaneously and be input to full bridge driving circuit; Avoid upper and lower bridge arm straight-through, prevent that the overcurrent of driving switch pipe from burning, working stability is reliable.2) signal transformation circuit is the RC circuit, and is simple in structure, and cost is low; 3) the Hall element detection module is integrated IC chip, directly produces digital square-wave, and it is bad to form module, reduced volume; 4) thus the resistance value ratio of regulating resistance R 7, resistance R 8 is regulated the reference voltage V1 of comparator IC1A negative input end; Thereby the reference voltage V2 of the positive input terminal of the resistance value ratio comparator IC1B of adjusting resistance R 9 and resistance R 10; Dead Time T is regulated by reference voltage V1 and reference voltage V2, and it is very convenient to revise Dead Time.

Description of drawings:

Fig. 1 is the circuit block diagram of the utility model.

Fig. 2 A is the corresponding partial circuit figure of Fig. 1.

Fig. 2 B is the corresponding another part circuit diagram of Fig. 1.

Fig. 3 is the utility model signal timing diagram.

Embodiment:

Below through specific embodiment and combine accompanying drawing that the utility model is described in further detail.

Like Fig. 1, Fig. 2 A, Fig. 2 B, shown in Figure 3; A kind of low power brush DC monophase machine controller; Comprise Hall element detection module 1 and full bridge driving circuit 4; 4 outputs of full bridge driving circuit 4 are connected with the winding of motor, and it comprises that also signal transformation circuit 2 and two-way have the interlocking comparator 3 of Dead Time in addition, and the square-wave signal of Hall element detection module 1 output is handled through signal transformation circuit 2 and formed trapezoidal wave signal; Trapezoidal wave signal is input to interlocking comparator 3 processing that two-way has Dead Time, forms two inputs that two-way has the square-wave signal of Dead Time T and is input to full bridge driving circuit 4.Signal transformation circuit 2 is RC circuit, comprises resistance R 19 and capacitor C 4.The Hall element detection module is integrated IC chip, comprises chip H1 and resistance R 6.

Full bridge driving circuit 4 comprises triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6, diode D1, diode D2, diode D3, diode D, diode D9, diode D10, resistance 17, resistance 18, resistance 14, resistance 15, resistance 16, resistance 11, resistance 12, resistance 13, resistance 30, resistance 31.

The interlocking comparator 3 that described two-way has Dead Time comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, comparator IC1A and comparator IC1B; Resistance R 7, two ends, resistance R 8 series connection back connect power vd D and ground respectively; Resistance R 9 connects power vd D and ground respectively with two ends, resistance R 10 series connection back, and comparator IC1A negative input end is connected between resistance R 7, the resistance R 8; The positive input terminal of comparator IC1B is connected between resistance R 9 and the resistance R 10; The negative input end of trapezoidal wave signal difference input comparator IC1A positive input terminal and comparator IC1B; Thereby the resistance value ratio of regulating resistance R 7, resistance R 8 is regulated the reference voltage V1 of comparator IC1A negative input end; Thereby the reference voltage V2 of the positive input terminal of the resistance value ratio comparator IC1B of adjusting resistance R 9 and resistance R 10, Dead Time T is regulated by reference voltage V1 and reference voltage V2.As shown in Figure 3, reference voltage V1 is different with reference voltage V2, reference voltage V1 can be set greater than Vset, reference voltage V2 can be set less than Vset, Vset=(V1+V2)/2.

The principle of the utility model is: like Fig. 1 and shown in Figure 4, the output terminals A point of Hall element detection module 1 produces square-wave signal, and A point square-wave signal is handled through signal transformation circuit 2 and formed B point trapezoidal wave signal, and both sides form the straight line of certain slope; B point trapezoidal wave signal is input to interlocking comparator 3 processing that two-way has Dead Time, forms the square-wave signal that the two-way complementary differential has Dead Time T, i.e. C point signal and D point signal; C point signal with dashed lines indicates among Fig. 4, and D point signal indicates with solid line, forms Dead Time T between them; Be C point signal, when D point signal is high level, the switching tube of last bridge wall, down the switching tube of bridge wall is closed, C point signal, when D point signal is low level; The switching tube of the switching tube of last bridge wall, following bridge wall is conducting; Avoid upper and lower bridge arm straight-through, prevent that the overcurrent of driving switch pipe from burning, working stability is reliable.

Claims

1. low power brush DC monophase machine controller; Comprise Hall element detection module (1) and full bridge driving circuit (4); 4 outputs of full bridge driving circuit (4) are connected with the winding of motor; It is characterized in that: it comprises that also signal transformation circuit (2) and two-way have the interlocking comparator (3) of Dead Time; The square-wave signal of Hall element detection module (1) output is handled through signal transformation circuit (2) and is formed trapezoidal wave signal, and trapezoidal wave signal is input to interlocking comparator (3) processing that two-way has Dead Time, forms two inputs that two-way has the square-wave signal of Dead Time (T) and is input to full bridge driving circuit (4).

2. a kind of low power brush DC monophase machine controller according to claim 1; It is characterized in that: the interlocking comparator (3) that described two-way has Dead Time comprises resistance (R7), resistance (R8), resistance (R9), resistance (R10), comparator (IC1A) and comparator (IC1B); Resistance (R7), two ends, resistance (R8) series connection back connect power supply (VDD) and ground respectively; Resistance (R9) and two ends, resistance (R10) series connection back connect power supply (VDD) and ground respectively, and comparator (IC1A) negative input end is connected between resistance (R7), the resistance (R8); The positive input terminal of comparator (IC1B) is connected between resistance (R9) and the resistance (R10), the negative input end of trapezoidal wave signal difference input comparator (IC1A) positive input terminal and comparator (IC1B).

3. a kind of low power brush DC monophase machine controller according to claim 2; It is characterized in that: regulate resistance (R7), resistance (R8) thus resistance value ratio regulate the reference voltage (V1) of comparator (IC1A) negative input end; Regulate resistance (R9) with resistance (R10) thus the reference voltage (V2) of positive input terminal of resistance value ratio comparator (IC1B), Dead Time (T) is by reference voltage (V1) and reference voltage (V2) adjusting.

4. according to claim 1,2 or 3 described a kind of low power brush DC monophase machine controllers, it is characterized in that: signal transformation circuit (2) is the RC circuit, comprises resistance (R19) and electric capacity (C4).

5. a kind of low power brush DC monophase machine controller according to claim 1, it is characterized in that: Hall element detection module (1) is integrated IC chip.