CN202261131U - Driving device for integrated brushless direct current motor - Google Patents
Driving device for integrated brushless direct current motor Download PDFInfo
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- CN202261131U CN202261131U CN2011203460403U CN201120346040U CN202261131U CN 202261131 U CN202261131 U CN 202261131U CN 2011203460403 U CN2011203460403 U CN 2011203460403U CN 201120346040 U CN201120346040 U CN 201120346040U CN 202261131 U CN202261131 U CN 202261131U
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Abstract
The utility model relates to the technical field of brushless direct current motors, and concretely relates to a driving device for an integrated brushless direct current motor. The driving device is provided with an end cover, and is characterized in that: the end cover is provided with a power board and a control board; wherein the power board is provided with a major loop, an inlet wire open-phase detection circuit, a bus current detection circuit, an under-voltage and overvoltage detection circuit, a back electromotive force detection circuit, and a switch power supply circuit; and the control board is provided with a DSP (Digital Signal Processor) control system circuit, a communication module circuit, and an analog quantity speed setting circuit. By adopting the above structure, the driving device of the utility model is embedded into a motor, a control circuit and a power circuit are integrated into a whole, thereby greatly reducing a volume, and omitting a line for connecting the motor with a driver, therefore, the driving device of the utility model has the advantages of novel structure, small size, high reliability, compact structure, high power density, convenient installation, convenient maintenance, easy operation, easy movement, etc.
Description
Technical field
The utility model relates to the brshless DC motor technical field, specifically a kind of drive unit of integrated brshless DC motor.
Background technology
Brshless DC motor is the electromechanical integrated product that integrates alternating current machine and direct current machine advantage; It had both had series of advantages such as ac motor structure is simple, reliable, easy to maintenance; Possess the characteristics of direct current machine operational efficiency height, good speed adjustment features again, do not have excitation loss simultaneously, therefore the application of brshless DC motor is universal day by day in recent years; And be accompanied by popularizing of brshless DC motor, the Design on driving device supporting with it also had higher requirement.
Through retrieval; CN201315560Y discloses a kind of utility model patent of driven by Brush-Less DC motor device, and it comprises microprocessor, IPM module, rectification module, DC bus-bar voltage testing circuit, motor speed testing circuit, motor rotor position testing circuit, DC/DC power module, and three-phase alternating current is divided into three tunnel outputs through rectification module; One the road to the IPM intelligent object; One road input to power module, Third Road is to the DC bus-bar voltage testing circuit, and the output of DC bus-bar voltage testing circuit is to microprocessor; The output of power module is to microprocessor; The output of IPM module connects direct current machine, and microprocessor is received in the output of motor speed testing circuit, motor rotor position testing circuit, and the deficiency of this driven by Brush-Less DC motor device is: volume is big, cost is high, installation is inconvenient.
Summary of the invention
The purpose of the utility model is the deficiency that solves above-mentioned prior art, and the drive unit of a kind of novel structure, cost is low, volume is little, easy for installation integrated brshless DC motor is provided.
The utility model solves the technical scheme that its technical problem adopted:
A kind of drive unit of integrated brshless DC motor; Be provided with end cap; It is characterized in that end cap is provided with power amplifier board and control board; Power amplifier board is provided with major loop, inlet wire lack detection circuit, bus current testing circuit, under-voltage and over-voltage detection circuit, back-emf sensing circuit and switching power circuit, and control board is provided with DSP control system circuit and communication module circuit
Wherein:
Be provided with inlet wire electromagnetic interface filter, piezo-resistance protection in the major loop, used X electric capacity, Y electric capacity and three-phase common-mode filter to suppress differential mode and common mode disturbances; Rectifier bridge and inverter bridge all are integrated in the power model; Power model adopts chip SEMIKRON integrated level high, and area occupied is little; Have the LC structure on the dc bus, realize Active PFC (PFC),
The inlet wire lack detection circuit is to be sent to dsp chip after the three-phase electricity that is sent to power model is handled through the testing circuit of being made up of resistance, diode and optocoupler to read; Read the output digital signal LHP1 of lack detection circuit and the duty ratio of LHP2 and judge whether phase shortage; Have the inlet wire lacuna and report to the police, overload, temperature alarm, overcurrent and over voltage alarm; Functions such as power factor correction
The bus current testing circuit is through very little current sense resistor of series connection on the bus; Isolate the voltage signal that amplifies the resistance two ends through linear optical coupling; The scope that becomes signal processing control chip to receive through a modulate circuit again, thus current of electric is fed back and keeps watch on
Under-voltage and over-voltage detection circuit is the method that adopts big resistive isolation, is converted into the analog signal that control chip is imported to busbar voltage through a simple discharge circuit, realizes under-voltage and the overvoltage detection; This amplifier be input as busbar voltage, input resistance is got very big, feedback resistance is very little; Thereby the input voltage that makes actual amplifier pin is not very big; The electric current that flows through is also very little, has realized that the effect of isolating has also realized the detection of voltage simultaneously
Counter electromotive force detection circuit is a low pass filter, adopts " terminal voltage method " to realize that no transducer controls, through the processing to the voltage to earth of motor three-phase UVW; Generate rotor-position signal through dsp processor, terminal voltage is divided into back-emf signal and electric current afterflow interference signal, the motor three-phase voltage is at first through low pass filter filters out high-frequency interferencing signal and step-down; Remove direct current component through an electric capacity again; Compare the signal of handling with by the dummy neutral voltage that three-phase constructs then, and two kinds of signals are carried out the calculating of phase place and amplitude, the phase advance angle degree of the rotor-position signal that obtains causing by the electric current afterflow; The deviation angle of determining electric current afterflow influence through detection electric current, rotating speed, duty ratio, busbar voltage and the parameter of electric machine compensates; Thereby obtain the signal of back electromotive force zero-crossing, make commutation near best commutation constantly constantly, that guarantees to commutate correctly carries out; Expanded the range of application of brushless direct current motor sensorless greatly
Switching power circuit adopts inverse excitation type converter, is input as busbar voltage, exports the direct voltage of 3 tunnel isolation, is respectively applied for DSP control system circuit and communication module circuit,
DSP control system circuit control acp chip is DSP, has the input of 6 tunnel analog signals, 3 pairs of PWM outputs,
The communication module circuit comprises RS232 and RS485 two kind of one step serial communication mode; Wherein RS232 is used for the operations such as maintenance to program; RS485 is used for Industry Control; Can carry out RS232, the input of RS485 bus communication and analog quantity speed given circuit, the analog quantity speed given circuit is through regulating motor speed to the controller input voltage
Control board is provided with three groups of terminal board interfaces; Be respectively three phase power inlet wire interface, driver warning output interface, serial ports RS232, serial ports RS485 and analog input interface; Three group leaders are respectively 12 terminals, 3 terminals and 5 terminals, connect with communication or with analog quantity speed governing, protection warning and three-phase alternating current input respectively through three groups of terminal board interfaces on the control board.
The utility model can be kept apart " ground wire " of " ground wire " of drive circuit and major loop and control circuit, to increase the stability of system.
The utility model can be provided with temperature sensing circuit on drive plate; Temperature sensing circuit is made up of conventional, electric-resistance, electric capacity, thermistor and amplifier; Temperature to rectification and inversion module, power amplifier board, motor detects in real time, prevents the generation that causes job insecurity and abnormal conditions owing to too high or too low for temperature.
The utility model is owing to adopt said structure; The utility model is embedded in the motor; Integrate control circuit and power circuit; Reduce volume greatly, saved the circuit that connects motor and driver, had a novel structure, volume is little, reliability is high, compact conformation, power density are high, easy for installation, easy to maintenance, easy operating and advantage such as mobile.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the signaling interface figure of the utility model.
Fig. 3 is a counter electromotive force detection circuit among the present invention.
Fig. 4 is under the heavy duty, back electromotive force detection signal when current time is very long and Hall detection signal.Wherein signal 1 is a back electromotive force U phase detection signal, and signal 2 is a Hall U phase detection signal, and signal 3 is that signal 4 is a simulated neutral point voltage signal through the back-emf signal behind the depth filtering.
Mark in the accompanying drawing 1,2: power amplifier board 1, control board 2, electromagnetic interface filter 3, rectifier bridge 4, inverter bridge 5, power model 6, testing circuit 7, switching power circuit 8, communication module circuit 9, analog quantity speed given circuit 10, control circuit 11, three-phase alternating current input 12, host computer 13, counter electromotive force detection circuit 14, potentiometer 15, motor 16, Active PFC 17, drive circuit 18.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
Shown in accompanying drawing; A kind of drive unit of integrated brshless DC motor is provided with end cap, it is characterized in that end cap is provided with power amplifier board 1 and control board 2; Control board 2 is fixed on the power amplifier board 1; Power amplifier board 1 is provided with major loop, inlet wire lack detection circuit, bus current testing circuit, under-voltage and over-voltage detection circuit, back-emf sensing circuit 14 and switching power circuit 8, and control board 2 is provided with DSP control system circuit and communication module circuit 9
Wherein:
Be provided with inlet wire electromagnetic interface filter 3, piezo-resistance protection in the major loop, used X electric capacity, Y electric capacity and three-phase common-mode filter to suppress differential mode and common mode disturbances; Rectifier bridge 4 all is integrated in the power model 6 with inverter bridge 5; Power model 6 adopts chip SEMIKRON integrated level high, and area occupied is little; Have the LC structure on the dc bus, realize Active PFC (PFC) 17,
The inlet wire lack detection circuit is to be sent to dsp chip after the three-phase electricity that is sent to power model is handled through the testing circuit of being made up of resistance, diode and optocoupler 7 to read; Read the output digital signal LHP1 of lack detection circuit and the duty ratio of LHP2 and judge whether phase shortage; Have the inlet wire lacuna and report to the police, overload, temperature alarm, overcurrent and over voltage alarm; Functions such as power factor correction
The bus current testing circuit is through very little current sense resistor of series connection on the bus; Isolate the voltage signal that amplifies the resistance two ends through linear optical coupling; The scope that becomes signal processing control chip to receive through a modulate circuit again, thus current of electric is fed back and keeps watch on
Under-voltage and over-voltage detection circuit is the method that adopts big resistive isolation, is converted into the analog signal that control chip is imported to busbar voltage through a simple discharge circuit, realizes under-voltage and the overvoltage detection; This amplifier be input as busbar voltage, input resistance is got very big, feedback resistance is very little; Thereby the input voltage that makes actual amplifier pin is not very big; The electric current that flows through is also very little, has realized that the effect of isolating has also realized the detection of voltage simultaneously
Counter electromotive force detection circuit 14 is low pass filters, adopts " terminal voltage method " to realize that no transducer controls, through the processing to the voltage to earth of motor three-phase UVW; Generate rotor-position signal through dsp processor, terminal voltage is divided into back-emf signal and electric current afterflow interference signal, the motor three-phase voltage is at first through low pass filter filters out high-frequency interferencing signal and step-down; Remove direct current component through an electric capacity again; Compare the signal of handling with by the dummy neutral voltage that three-phase constructs then, and two kinds of signals are carried out the calculating of phase place and amplitude, the phase advance angle degree of the rotor-position signal that obtains causing by the electric current afterflow; The deviation angle of determining electric current afterflow influence through detection electric current, rotating speed, duty ratio, busbar voltage and the parameter of electric machine compensates; Thereby obtain the signal of back electromotive force zero-crossing, make commutation near best commutation constantly constantly, that guarantees to commutate correctly carries out; Expanded the range of application of brushless direct current motor sensorless greatly
DSP control system circuit control acp chip is DSP, has the input of 6 tunnel analog signals, 3 pairs of PWM outputs,
The utility model can be kept apart " ground wire " of drive circuit 18 and major loop and " ground wire " of control circuit 11, to increase the stability of system.
The utility model can be provided with temperature sensing circuit on drive plate 1; Temperature sensing circuit is made up of resistance, electric capacity, thermistor and amplifier; Temperature to rectification and inversion module, power amplifier board, motor detects in real time; Prevent the generation that causes job insecurity and abnormal conditions owing to too high or too low for temperature
In order to satisfy the requirement of device to bulk, control board 2 vertically is connected with power amplifier board 1, power amplifier board 1 closely cooperates with electric motor end cap; The signaling interface of control board is convenient to wiring up, through three groups of terminal board interfaces on the control board 2 communication and analog quantity speed governing, protection warning and three-phase alternating current input is connected; During work, three-phase alternating current input 12 becomes the given speed of resistance locator through host computer 13 or adjusting; Motor 16 begins to start to given speed operation from static, and motor speed can be regulated arbitrarily in setting range by host computer or potentiometer 15, adopt during startup " the injection current pulse " and the method starting; Starting speed is usually in the 50-80r/min scope, through detecting voltage vector and accelerating voltage vector alternating action in motor, when treating that rotating speed of motor is enough to make the counter electromotive force detection circuit operate as normal; Switch to the motor synchronizing state from starting state, after the entering motor synchronizing, adopt the PI controller; Realize non-overshoot, rise to given speed stably, the utility model is determined the deviation angle of electric current afterflow influence through inspection electric current, rotating speed, duty ratio, busbar voltage and the parameter of electric machine; Compensate, adopt the back electromotive force detection method, detect three phase terminals voltage through counter electromotive force detection circuit (like Fig. 3); After filter circuit carries out depth filtering, compare with simulated neutral point again, generate rotor-position signal through dsp processor, this method is very big owing to electric current when heavy duty; The long three phase terminals voltage waveform that can influence " ideal " of time of afterflow causes wave distortion, has influenced the accuracy of detected position signalling; Be illustrated in figure 4 as the position detection signal experimental waveform under the heavy duty, wherein signal 1 is the back electromotive force detection signal, and signal 4 is the hall position detection signal; Clearly back electromotive force detection signal 1 has bigger deviation with approaching best commutation Hall detection signal 4 constantly, and the utility model is separated analysis with the distortion voltage waveform part that the electric current afterflow causes from the terminal voltage waveform, terminal voltage is divided into back-emf signal and electric current afterflow interference signal; Two kinds of signals are carried out the calculating of phase place and amplitude; The phase advance angle degree of the rotor-position signal that obtains being caused by the electric current afterflow compensates, utilize microprocessor can calculate above-mentioned formula push away the leading angle of phase place; Therefore after the relation that records electric current afterflow angle and size of current; Only need to detect electric machine phase current, controller can be confirmed leading phase angle in real time, because the commutation of phase angular advance helps reducing the torque pulsation of brshless DC motor; So can according to size of current and rotating speed suitable carry out phase angle compensation; Thereby make motor reach optimal operational condition, make commutation near best commutation constantly constantly, that guarantees to commutate correctly carries out.
The utility model is owing to adopt said structure; The utility model is embedded in the motor; Integrate control circuit and power circuit; Reduce volume greatly, saved the circuit that connects motor and driver, had a novel structure, volume is little, reliability is high, compact conformation, power density are high, easy for installation, easy to maintenance, easy operating and advantage such as mobile.
Claims (1)
1. the drive unit of an integrated brshless DC motor; Be provided with end cap; It is characterized in that end cap is provided with power amplifier board and control board; Power amplifier board is provided with major loop, inlet wire lack detection circuit, bus current testing circuit, under-voltage and over-voltage detection circuit, back-emf sensing circuit and switching power circuit, and control board is provided with DSP control system circuit, communication module circuit and analog quantity speed given circuit, wherein: be provided with inlet wire electromagnetic interface filter, piezo-resistance protection in the major loop, use X electric capacity, Y electric capacity and three-phase common-mode filter to suppress differential mode and common mode disturbances; Rectifier bridge and inverter bridge all are integrated in the power model; Power model adopts chip SEMIKRON, has the LC structure on the dc bus, and the inlet wire lack detection circuit is to be sent to dsp chip after the three-phase electricity that is sent to power model is handled through the testing circuit of being made up of resistance, diode and optocoupler to read; The bus current testing circuit is to detect resistance through series current on the bus; Isolate the voltage signal that amplifies the resistance two ends through linear optical coupling, the scope that becomes signal processing control chip to receive through modulate circuit again, under-voltage is to be converted into the analog signal that control chip is imported to busbar voltage through a simple discharge circuit with over-voltage detection circuit; Counter electromotive force detection circuit is a low pass filter; Switching power circuit adopts inverse excitation type converter, is respectively applied for DSP control system circuit, communication module circuit and analog quantity speed given circuit, and DSP control system circuit control acp chip is DSP; The communication module circuit comprises RS232 and RS485 two kind of one step serial communication mode; Wherein RS232 is used for the operations such as maintenance to program, and RS485 is used for Industry Control, carries out RS232, RS485 bus communication and the input of analog quantity velocity setting; The analog quantity speed given circuit is through regulating motor speed to the controller input voltage; Control board is provided with three groups of terminal board interfaces, is respectively three phase power inlet wire interface, driver warning output interface, serial ports RS232, serial ports RS485 and analog input interface, and reporting to the police with communication and analog quantity speed governing, protection respectively through three groups of terminal board interfaces on the control board, input is connected with three-phase alternating current.
2. the drive unit of a kind of integrated brshless DC motor according to claim 1, its characteristic is to keep apart " ground wire " of " ground wire " of drive circuit and major loop and control circuit.
3. the drive unit of a kind of integrated brshless DC motor according to claim 1, its characteristic is that drive plate is provided with temperature sensing circuit, and the temperature of rectification and inversion module, power amplifier board, motor is detected in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203460403U CN202261131U (en) | 2011-09-15 | 2011-09-15 | Driving device for integrated brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203460403U CN202261131U (en) | 2011-09-15 | 2011-09-15 | Driving device for integrated brushless direct current motor |
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| Publication Number | Publication Date |
|---|---|
| CN202261131U true CN202261131U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203460403U Expired - Fee Related CN202261131U (en) | 2011-09-15 | 2011-09-15 | Driving device for integrated brushless direct current motor |
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| CN (1) | CN202261131U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868350A (en) * | 2012-09-21 | 2013-01-09 | 中南林业科技大学 | Quasi-close loop starting method of brushless direct current motor free of position sensor |
| CN105083513A (en) * | 2015-08-24 | 2015-11-25 | 上海瑞华(集团)有限公司 | Onboard water-cooled power driver control device |
| CN104485858B (en) * | 2014-12-11 | 2017-03-15 | 惠州市蓝微电子有限公司 | Brushless Hall-free sensor DC motor control circuit |
| CN107592038A (en) * | 2017-10-31 | 2018-01-16 | 浙江航星电机有限公司 | A kind of home rice whitener system of brushless electric machine servo controller driving |
| CN108233792A (en) * | 2018-01-15 | 2018-06-29 | 峰岹科技（深圳）有限公司 | BLDC motors and its back electromotive force zero-crossing acquisition method and driving device |
| CN110988672A (en) * | 2019-08-05 | 2020-04-10 | 江苏科技大学 | Locked-rotor anti-interference method and device for signal acquisition of Hall sensor of permanent magnet synchronous motor |
-
2011
- 2011-09-15 CN CN2011203460403U patent/CN202261131U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868350A (en) * | 2012-09-21 | 2013-01-09 | 中南林业科技大学 | Quasi-close loop starting method of brushless direct current motor free of position sensor |
| CN104485858B (en) * | 2014-12-11 | 2017-03-15 | 惠州市蓝微电子有限公司 | Brushless Hall-free sensor DC motor control circuit |
| CN105083513A (en) * | 2015-08-24 | 2015-11-25 | 上海瑞华(集团)有限公司 | Onboard water-cooled power driver control device |
| CN105083513B (en) * | 2015-08-24 | 2018-01-23 | 上海瑞华(集团)有限公司 | A kind of boat-carrying water-cooled power drill/driver control device |
| CN107592038A (en) * | 2017-10-31 | 2018-01-16 | 浙江航星电机有限公司 | A kind of home rice whitener system of brushless electric machine servo controller driving |
| CN108233792A (en) * | 2018-01-15 | 2018-06-29 | 峰岹科技（深圳）有限公司 | BLDC motors and its back electromotive force zero-crossing acquisition method and driving device |
| CN110988672A (en) * | 2019-08-05 | 2020-04-10 | 江苏科技大学 | Locked-rotor anti-interference method and device for signal acquisition of Hall sensor of permanent magnet synchronous motor |
| CN110988672B (en) * | 2019-08-05 | 2021-10-19 | 百恒石油装备有限公司 | Locked-rotor anti-interference method and device for signal acquisition of Hall sensor of permanent magnet synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130915 |