CN204633649U - Sofe Switch control module and driven by Brush-Less DC motor system - Google Patents
Sofe Switch control module and driven by Brush-Less DC motor system Download PDFInfo
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- CN204633649U CN204633649U CN201520301229.9U CN201520301229U CN204633649U CN 204633649 U CN204633649 U CN 204633649U CN 201520301229 U CN201520301229 U CN 201520301229U CN 204633649 U CN204633649 U CN 204633649U
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Abstract
A kind of Sofe Switch control module and driven by Brush-Less DC motor system, comprise: ADJ control unit is connected with delay unit and comparator, to obtain the tach signal of DC brushless motor and to obtain speed-regulating signal according to tach signal and input to comparator first input end, simultaneously obtain that Sofe Switch electric current declines respectively according to speed-regulating signal, the rise time reaches delay unit; OSC oscillator is connected with comparator, inputs to comparator second input with the sawtooth signal producing predetermined period; Delay unit is connected with logical block, declines or the rise time with the switch control logic signal lag Sofe Switch electric current of at least one power switch pipe that will obtain; Comparator is connected with logical block, to compare speed-regulating signal and sawtooth signal generation PWM waveform; Logical block is connected with driver element, modulates driver element with the output according to delay unit and comparator; Driver element is connected with power switch pipe, to control its Sofe Switch.The utility model realizes ultra-low noise and EMI, avoids decrease in efficiency.
Description
Technical field
The utility model relates to driven by Brush-Less DC motor technical field, particularly relates to a kind of the gradual change duty ratio Sofe Switch control module and the driven by Brush-Less DC motor system that are applied to Brushless DC Motor Drive Circuit.
Background technology
In the design of Brushless DC Motor Drive Circuit, unidirectional motor is driven, as long as with a large power triode or field effect transistor or the direct drive motor of relay; Two-way motor is driven, the H-bridge circuit be made up of 4 power components or the relay using a dpdt double-pole double-throw (DPDT) can be used; If need speed governing, the switch element such as triode, field effect transistor can be used to realize PWM (pulse width modulation) speed governing.
With reference to figure 1, a kind of rough schematic view of typical brush DC monophase machine drive circuit.As shown in Figure 1, motor (being reduced to inductance Motor in schematic diagram) is connected between the output A point of the power inverter be made up of 4 power switch S1-S4 and B point, changes current of electric direction by control inverter H brachium pontis four power switchs.When S1 and S4 conducting, when S2 and S3 disconnects, current of electric flows to B end from A end respectively; When S1 and S4 disconnects, during S2 and S3 conducting, electric current flows to A end from B end.During commutation, the sequence of movement difference of four power switchs can produce different current waveforms.Below for from electric current A to B commutation to the process of electric current B to A, provide the current diagram of traditional switch and modified model switch.
With reference to figure 2, current diagram during traditional switch commutation.The switching sequence of traditional switch is: the equal conducting of S1, S4 → S1, S4 all disconnects → equal the conducting of dead band → S2, S3; In Dead Time, four switches all disconnect.Due to the afterflow effect of motor inductances, electric current by the parasitic diode afterflow by S2 and S3, as shown in Figure 2.Now A terminal voltage is about-V
dio, B terminal voltage is about Vbus+V
dio, the very large V of inductance Motor both end voltage difference
aB=-(Vbus+2V
dio), during commutation, electric current sharply declines, therefore also referred to as high-speed switch.Its defect is that curent change is too fast, causes noise and EMI (Electro Magnetic Interference electromagnetic interference).
With reference to figure 3, current diagram during a kind of modified model switch commutation.The switching sequence of modified model switch is: S1, S4 equal conducting → S1 conducting, S4 disconnection → dead band 1 → S2 disconnection, S3 conducting → equal conducting of dead band 2 → S2, S3.In dead band 1, inductance Motor two ends electric current declines; In dead band 2, inductance Motor two ends electric current rises.As shown in Figure 3, in dead band 1, electric current is by the parasitic diode afterflow of S3; A terminal voltage is Vbus, B terminal voltage is Vbus+Vdio, the very little V of inductance Motor both end voltage difference
aB=-V
dio, the main anti-raw electrodynamic type by motor itself reduces electric current, therefore also referred to as switch at a slow speed.Its advantage is that curent change is slow, and noise is little; Its shortcoming is electric current linear change, and Dead Time is fixed, and the motor for different electric current and rotating speed exists the problem of decrease in efficiency.
Utility model content
The purpose of this utility model is, for brush DC monophase machine drive circuit Problems existing in prior art, a kind of Sofe Switch control module and driven by Brush-Less DC motor system are provided, realize gradual change duty ratio Sofe Switch, in commutation process, current non-linear slowly changes, waveform is more level and smooth, realizes ultra-low noise and EMI.
For achieving the above object, the utility model provides a kind of Sofe Switch control module, be applicable to driven by Brush-Less DC motor system, described driven by Brush-Less DC motor system comprises DC brushless motor and at least one power switch pipe, and Sofe Switch control module comprises: an ADJ control unit, an OSC oscillator, a delay unit, a comparator, a logical block and a driver element; Described ADJ control unit is connected with described delay unit and comparator respectively, for obtaining the tach signal of DC brushless motor, and after obtaining speed-regulating signal according to described tach signal, input to the first input end of described comparator, obtain Sofe Switch downslope time and Sofe Switch current rise time respectively according to described speed-regulating signal simultaneously and transfer to described delay unit; Described OSC oscillator is connected with described comparator, for generation of the sawtooth signal of predetermined period, and inputs to the second input of described comparator; Described delay unit is connected with described logical block, for inputing to described logical block by after Sofe Switch downslope time described in the switch control logic signal lag of the described at least one power switch pipe got or Sofe Switch current rise time; Described comparator is connected with described logical block, produces the adjustable PWM waveform of duty ratio, and input to described logical block for more described speed-regulating signal and sawtooth signal; Described logical block is connected with driver element, for modulating described driver element according to the output of described delay unit and comparator; Described driver element is connected with described at least one power switch pipe, for controlling the Sofe Switch of described at least one power switch pipe.
For achieving the above object, the utility model additionally provides a kind of driven by Brush-Less DC motor system, comprise a DC brushless motor and at least one power switch pipe, described at least one power switch pipe electricity connects described DC brushless motor, change the described DC brushless motor sense of current by controlling described at least one power switch pipe, described driven by Brush-Less DC motor system comprises Sofe Switch control module described in the utility model; Described ADJ control unit in described Sofe Switch control module is coupled to the position transducer of described DC brushless motor, with the tach signal of the Position input signal acquisition DC brushless motor according to described position transducer; Described delay unit in described Sofe Switch control module is coupled to the position transducer of described DC brushless motor, with the switch control logic signal of at least one power switch pipe according to the Position input signal acquisition of described position transducer; Described driver element electricity in described Sofe Switch control module connects described at least one power switch pipe, to control the Sofe Switch of described at least one power switch pipe.
The utility model has the advantage of: the driven by Brush-Less DC motor system that the utility model provides achieves gradual change duty ratio Sofe Switch, and in commutation process, current non-linear slowly changes, waveform is more level and smooth, realizes ultra-low noise and EMI.Meanwhile, the commutation time changes with motor speed, and rotating speed is faster, and the time is shorter, thus avoids decrease in efficiency.
Accompanying drawing explanation
Fig. 1, a kind of rough schematic view of typical brush DC monophase machine drive circuit;
Fig. 2, current diagram during traditional switch commutation;
Fig. 3, current diagram during a kind of modified model switch commutation;
Fig. 4, the schematic diagram of driven by Brush-Less DC motor system one execution mode described in the utility model;
Fig. 5, the schematic diagram of ADJ control unit one execution mode described in the utility model;
Fig. 6, current diagram during switch commutation shown in driven by Brush-Less DC motor system one embodiment described in the utility model;
Fig. 7 is the work wave schematic diagram of each node of embodiment described in Fig. 6.
Embodiment
The Sofe Switch control module provided the utility model below in conjunction with accompanying drawing and driven by Brush-Less DC motor system elaborate.
With reference to figure 4, the schematic diagram of driven by Brush-Less DC motor system one execution mode described in the utility model.Described driven by Brush-Less DC motor system comprises a DC brushless motor (in figure with position transducer 49 illustrate DC brushless motor) and at least one power switch pipe, described at least one power switch pipe electricity connects described DC brushless motor, a Sofe Switch control module 40.Described DC brushless motor can be single-phase/three-phase DC brushless motor; The described DC brushless motor sense of current is changed by controlling described at least one power switch pipe; Described Sofe Switch control module 40 is in order to control the Sofe Switch of described at least one power switch pipe.Modulate at least one power switch pipe described in close/open gradually by gradual change duty ratio Sofe Switch, allow DC brushless motor electric current smoothly slowly change, realize ultra-low noise and EMI.Present embodiment is described to control a Sofe Switch being placed on the power switch pipe M1 of Sofe Switch control module 40, described power switch pipe M1 can be the power switch of upper brachium pontis or lower brachium pontis in driven by Brush-Less DC motor system, described power switch pipe M1 can adopt NOMS, PMOS or other power switchs; Described power switch pipe M1 also can be built in Sofe Switch control module 40 in other embodiments.
Described Sofe Switch control module 40 comprises: ADJ control unit 41, OSC oscillator 42, delay unit 43, comparator 44, logical block 45 and a driver element 46.
Described ADJ control unit 41 is connected with described delay unit 43 and comparator 44 respectively, for obtaining the tach signal of DC brushless motor, and after obtaining speed-regulating signal according to described tach signal, input to the first input end of described comparator 44, obtain Sofe Switch downslope time and Sofe Switch current rise time respectively according to described speed-regulating signal simultaneously and transfer to described delay unit 43.
Be specifically as follows: described ADJ control unit 41 is coupled to the position transducer 49 of described DC brushless motor, to obtain the tach signal Speed [m:0] of DC brushless motor according to the Position input signal Pos [n:0] of described position transducer 49, wherein n, m are two different variablees.Described ADJ control unit 41 is according to described tach signal, according to corresponding slope the ADJ direct voltage of input dropped to the minimum duty cycle voltage in speed adjustable range, afterwards with same slope from minimum duty cycle voltage rise to described ADJ direct voltage, and this slope signal is inputed to the first input end of described comparator as speed-regulating signal Adj_Ramp; Simultaneously, obtain, according to corresponding slope, the ADJ direct voltage of input is dropped to minimum duty cycle voltage required time as Sofe Switch downslope time Phase1, to obtain according to corresponding slope from minimum duty cycle voltage rise to described ADJ direct voltage required time as Sofe Switch Phase2 current rise time, and transfer to described delay unit 43.ADJ control unit 41 described in the utility model is on the basis of conventional ADJ speed governing, according to different Position input signals, in the Sofe Switch stage, the ADJ direct voltage of input is reduced to minimum duty cycle voltage VL in speed adjustable range with corresponding slope, then returns to the ADJ direct voltage of original input with same slope.This slope is determined by the tach signal that obtains, and rotating speed is faster, and slope is larger, voltage rise or decrease speed faster.
With reference to figure 5, the schematic diagram of ADJ control unit one execution mode described in the utility model; As optional execution mode, described ADJ control unit 41 comprises a clamper subelement Clamp, charging capacitor C0 further, electric current leakage Idc1, first compares subelement CMP1, current source Idc2 and second and compares subelement CMP2.Described clamper subelement Clamp connects charging capacitor C0 by one first sub-switch S 51, for will input ADJ direct voltage clamper to the maximum duty cycle voltage Vclamp in speed adjustable range.Described electric current leaks Idc1 one end ground connection, and the other end is connected to by one second sub-switch S 52 positive input that first positive input and second comparing subelement CMP1 compares subelement CMP2 respectively; First negative input comparing subelement CMP1 meets the minimum duty cycle voltage VL in speed adjustable range, and the second negative input comparing subelement CMP2 meets described maximum duty cycle voltage Vclamp.Described current source Idc2 one end is connected with external power source VDC, and the other end is connected to by one the 3rd sub-switch S 53 positive input that first positive input and second comparing subelement CMP1 compares subelement CMP2 respectively.
The mode of realization that Sofe Switch controls is: first by the ADJ direct voltage Adj clamper of input to the maximum duty cycle voltage Vclamp in speed adjustable range; After receiving Sofe Switch control commencing signal SoftSwitch, disconnect S51, closed S52, leak Idc1 by the voltage drop of storage on electric capacity C0 to minimum duty cycle voltage VL by electric current; Trigger CMP1, the Sofe Switch phase1 stage that electric current declines terminates.Disconnect S52, conducting S53, charge to electric capacity C0 with onesize current source Idc2, make Adj voltage rise; When after Adj voltage rise to the ADJ direct voltage of initial input, trigger CMP2, terminate the Sofe Switch phase2 stage that electric current rises.Sofe Switch controls to terminate, and disconnects S52 and S53, conducting S51, enters normal speed-regulating mode.Wherein current source Idc2 and electric current leak the size of current of Idc1 and direct current brushless motor speed is directly proportional, thus it is faster to realize rotating speed, and the Sofe Switch control time is shorter.
Continue with reference to figure 4, described OSC oscillator 42 is connected with described comparator 44, for generation of the sawtooth signal of predetermined period, and inputs to the second input of described comparator 44.The utility model is by comparator 44, and the sawtooth waveforms SAW that the level Adj_Ramp and the OSC oscillator 42 that are produced by ADJ control unit 41 produce compares the PWM square wave of production different duty.
As preferred embodiment, described ADJ control unit 41 is connected with described OSC oscillator 42 further, Sofe Switch electric current decline required time and Sofe Switch electric current rising required time sum are inputed to described OSC oscillator 42 as Sofe Switch signal SoftSwitch by ADJ control unit 41, and the frequency of oscillation controlling described OSC oscillator 42 accelerates Speed_up within the described Sofe Switch signal SoftSwitch time.OSC oscillator 42 is within the SoftSwitch time, and frequency of oscillation is accelerated, and can produce more square-wave pulse within the commutation time, make there is the more multicycle in the Sofe Switch stage, duty ratio fade effect is more obvious.
Described delay unit 43 is connected with described logical block 45, for inputing to described logical block 45 by after Sofe Switch downslope time described in the switch control logic signal Gate_ON time delay of the power switch pipe got M1 or Sofe Switch current rise time.Also namely, the phase place phase1 that the time that ADJ direct voltage rises and declines controls respectively as Sofe Switch and phase place phase2 Signal transmissions are to delay unit 43.Delay unit 43 when Sofe Switch electric current declines by the Gate_ON signal lag phase1 time, when Sofe Switch electric current rises by the Gate_ON signal lag phase2 time, to be used for doing Sofe Switch handoff procedure.Be specifically as follows: described delay unit 43 is coupled to the position transducer 49 of described DC brushless motor, to obtain the switch control logic signal Gate_ON of power switch pipe M1 according to the Position input signal Pos [n:0] of described position transducer 49.
Described comparator 44 is connected with described logical block 45, produces the adjustable PWM waveform of duty ratio, and input to described logical block 45 for more described speed-regulating signal Adj_Ramp and sawtooth signal SAW, for modulation driver element 46.
Described logical block 45 is connected with driver element 46, for modulating described driver element 46 according to described delay unit 43 with the output of comparator 44.Also the gradual change PWM the square wave namely time delayed signal of delay unit 43 and comparator 44 exported by logical block 45 carries out logical operation, modulates described driver element 46; The modulation being subject to gradual change PWM at the cut-off signal of phase1 time internal power switching tube M1 is disconnected gradually, is subject to the modulation conducting gradually of gradual change PWM at the Continuity signal of phase2 time internal power switching tube M1, thus realizes Sofe Switch handoff procedure.Described logical block 45 is logical AND gate in the present embodiment, also can be logic sum gate in other embodiments, or other logical operation assembly.
Described driver element 46 is connected with described power switch pipe M1, for controlling the Sofe Switch of described power switch pipe M1.Also be that described driver element 46 is according to the output driving power switching tube M1 of logical block 45, the modulation being subject to gradual change PWM at the cut-off signal of phase1 time internal power switching tube M1 disconnects gradually, is subject to the modulation conducting gradually of gradual change PWM at the Continuity signal of phase2 time internal power switching tube M1.
As optional execution mode, described Sofe Switch control module 40 comprises a timer 47 further; Described timer 47 is connected with described OSC oscillator 42 and ADJ control unit 41 respectively.OSC oscillator 42 produces the clock of square wave as timer 42 of some cycles; Timer 47 receives the Position input signal Pos [n:0] of the position transducer 49 of described DC brushless motor, and after receiving Position input signal, the clock signal clk provided according to described OSC oscillator 42 calculates the rotating speed of DC brushless motor, and the tach signal Speed [m:0] calculated is inputed to described ADJ control unit 41.Tach signal Speed [m:0] can be input to ADJ control unit 41 with 2 binary signal by timer 47.
As optional execution mode, described Sofe Switch control module 40 comprises a decoder 48 further; Described decoder 48 is connected with described delay unit 43, for receiving the Position input signal Pos [n:0] of the position transducer 49 of described DC brushless motor, and the Position input signal received is decoded, the switch control logic signal Gate_ON obtaining power switch pipe M1 inputs to described delay unit 43.
Driven by Brush-Less DC motor system one embodiment described in the utility model is provided, to be described further the utility model below in conjunction with accompanying drawing.
With reference to figure 6-Fig. 7, wherein, current diagram when Fig. 6 is driven by Brush-Less DC motor system one embodiment switch commutation described in the utility model; Fig. 7 is the work wave schematic diagram of each node of embodiment described in Fig. 6.Driven by Brush-Less DC motor system described in the utility model achieves gradual change duty ratio Sofe Switch mode.The switching sequence of which is: S1, S4 equal conducting → S1 conducting, S4 disconnect (duration phase1) → S1 disconnection, S4 disconnection → S3 conducting, the equal conducting of S2 conducting gradually (duration phase2) → S2, S3 gradually.With reference to figure 6 in the phase1 time, S4 is controlled slowly to disconnect (Soft OFF) by the square wave of gradual change duty ratio; Flow to GND at the time current of S4 conducting from S4, the time current disconnected at S4 flows to bus through the parasitic diode of S3; Inductance both end voltage difference drops to-Vdio gradually by Vbus, the decline that electric current is slowly level and smooth.In like manner, in the phase2 time, electric current is from zero slowly level and smooth rising (Soft ON); Thus current non-linear is slowly changed, waveform is more level and smooth, realizes ultra-low noise and EMI.Meanwhile, phase1 and the phase2 time changes with motor speed, and rotating speed is faster, and the phase time is shorter, thus avoids decrease in efficiency.And within the SoftSwitch time, the frequency of oscillation producing SAW ripple is accelerated, and can produce more PWM square-wave pulse within the commutation time, make there is the more multicycle in the Sofe Switch stage, duty ratio fade effect is more obvious.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (8)
1. a Sofe Switch control module, be applicable to driven by Brush-Less DC motor system, described driven by Brush-Less DC motor system comprises DC brushless motor and at least one power switch pipe, it is characterized in that, comprising: an ADJ control unit, an OSC oscillator, a delay unit, a comparator, a logical block and a driver element;
Described ADJ control unit is connected with described delay unit and comparator respectively, for obtaining the tach signal of DC brushless motor, and after obtaining speed-regulating signal according to described tach signal, input to the first input end of described comparator, obtain Sofe Switch downslope time and Sofe Switch current rise time respectively according to described speed-regulating signal simultaneously and transfer to described delay unit;
Described OSC oscillator is connected with described comparator, for generation of the sawtooth signal of predetermined period, and inputs to the second input of described comparator;
Described delay unit is connected with described logical block, for inputing to described logical block by after Sofe Switch downslope time described in the switch control logic signal lag of the described at least one power switch pipe got or Sofe Switch current rise time;
Described comparator is connected with described logical block, produces the adjustable PWM waveform of duty ratio, and input to described logical block for more described speed-regulating signal and sawtooth signal;
Described logical block is connected with driver element, for modulating described driver element according to the output of described delay unit and comparator;
Described driver element is connected with described at least one power switch pipe, for controlling the Sofe Switch of described at least one power switch pipe.
2. Sofe Switch control module according to claim 1, it is characterized in that, described ADJ control unit is according to described tach signal, according to corresponding slope the ADJ direct voltage of input dropped to the minimum duty cycle voltage in speed adjustable range, afterwards with same slope from minimum duty cycle voltage rise to described ADJ direct voltage, and this slope signal is inputed to the first input end of described comparator as speed-regulating signal; Simultaneously, obtain, according to corresponding slope, the ADJ direct voltage of input is dropped to minimum duty cycle voltage required time as Sofe Switch downslope time, to obtain according to corresponding slope from minimum duty cycle voltage rise to described ADJ direct voltage required time as Sofe Switch current rise time, and transfer to described delay unit.
3. Sofe Switch control module according to claim 1, is characterized in that, described ADJ control unit comprises a clamper subelement, charging capacitor further, electric current leaks, first compares subelement, current source and second compares subelement;
Described clamper subelement connects charging capacitor by one first sub-switch, for will the ADJ direct voltage clamper of input to the maximum duty cycle voltage in speed adjustable range;
Described electric current leaks one end ground connection, the other end is connected to by one second sub-switch the positive input that the first positive input and second comparing subelement compares subelement respectively, first negative input comparing subelement connects the minimum duty cycle voltage in speed adjustable range, and the second negative input comparing subelement connects described maximum duty cycle voltage;
Described current source is connected to by one the 3rd sub-switch the positive input that the first positive input and second comparing subelement compares subelement respectively;
After Sofe Switch control starts, disconnect the first sub-switch, closed second sub-switch, leaked by electric current and compare subelement by triggering first after the voltage drop that charging capacitor stores to minimum duty cycle voltage; Disconnecting the second sub-switch afterwards, closed 3rd sub-switch, is trigger second after charging capacitor charging makes voltage rise to maximum duty cycle voltage to compare subelement by current source; After Sofe Switch control terminates, disconnect the second sub-switch and the 3rd sub-switch, closed first sub-switch;
Wherein, electric current leaks equal with the size of current of current source and is directly proportional to direct current brushless motor speed.
4. Sofe Switch control module according to claim 1, it is characterized in that, described ADJ control unit is connected with described OSC oscillator further, Sofe Switch electric current decline required time and Sofe Switch electric current rising required time sum are inputed to described OSC oscillator as Sofe Switch signal by ADJ control unit, and the frequency of oscillation controlling described OSC oscillator is accelerated in described Sofe Switch signal time.
5. Sofe Switch control module according to claim 1, is characterized in that, described Sofe Switch control module comprises a timer further;
Described timer is connected with described OSC oscillator and ADJ control unit respectively, after receiving Position input signal, the clock signal provided according to described OSC oscillator calculates the rotating speed of DC brushless motor, and the tach signal calculated is inputed to described ADJ control unit.
6. Sofe Switch control module according to claim 1, is characterized in that, described Sofe Switch control module comprises a decoder further;
Described decoder is connected with described delay unit, decodes after receiving Position input signal, and the switch control logic signal obtaining power switch pipe inputs to described delay unit.
7. a driven by Brush-Less DC motor system, comprise a DC brushless motor and at least one power switch pipe, described at least one power switch pipe electricity connects described DC brushless motor, the described DC brushless motor sense of current is changed by controlling described at least one power switch pipe, it is characterized in that, described driven by Brush-Less DC motor system comprises the Sofe Switch control module described in claim 1-6 any one;
Described ADJ control unit in described Sofe Switch control module is coupled to the position transducer of described DC brushless motor, with the tach signal of the Position input signal acquisition DC brushless motor according to described position transducer;
Described delay unit in described Sofe Switch control module is coupled to the position transducer of described DC brushless motor, with the switch control logic signal of at least one power switch pipe according to the Position input signal acquisition of described position transducer;
Described driver element electricity in described Sofe Switch control module connects described at least one power switch pipe, to control the Sofe Switch of described at least one power switch pipe.
8. driven by Brush-Less DC motor system according to claim 7, is characterized in that, described at least one power switch pipe is built in described Sofe Switch control module.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868802A (en) * | 2015-05-11 | 2015-08-26 | 上海晶丰明源半导体有限公司 | Soft-switching control module and direct-current brushless motor driving system |
| CN105429547A (en) * | 2015-12-11 | 2016-03-23 | 浙江亿利达风机股份有限公司 | Single-phase brushless direct current motor vector control method based on virtual phase construction |
| CN109842330A (en) * | 2017-11-24 | 2019-06-04 | 南京德朔实业有限公司 | A kind of control method of brushless single phase motor |
| CN112649727A (en) * | 2019-10-11 | 2021-04-13 | 博世华域转向***有限公司 | RPS collection value and current collection value time delay judgment method |
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2015
- 2015-05-11 CN CN201520301229.9U patent/CN204633649U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868802A (en) * | 2015-05-11 | 2015-08-26 | 上海晶丰明源半导体有限公司 | Soft-switching control module and direct-current brushless motor driving system |
| CN105429547A (en) * | 2015-12-11 | 2016-03-23 | 浙江亿利达风机股份有限公司 | Single-phase brushless direct current motor vector control method based on virtual phase construction |
| CN105429547B (en) * | 2015-12-11 | 2018-05-29 | 浙江亿利达风机股份有限公司 | Single-phase brushless direct-current motor vector control method based on virtual phase structure |
| CN109842330A (en) * | 2017-11-24 | 2019-06-04 | 南京德朔实业有限公司 | A kind of control method of brushless single phase motor |
| CN109842330B (en) * | 2017-11-24 | 2021-12-14 | 南京德朔实业有限公司 | Control method of single-phase brushless motor |
| CN112649727A (en) * | 2019-10-11 | 2021-04-13 | 博世华域转向***有限公司 | RPS collection value and current collection value time delay judgment method |
| CN112649727B (en) * | 2019-10-11 | 2022-09-16 | 博世华域转向***有限公司 | RPS collection value and current collection value time delay judgment method |
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