CN104617805A - Novel main power circuit - Google Patents
Novel main power circuit Download PDFInfo
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- CN104617805A CN104617805A CN201510091630.9A CN201510091630A CN104617805A CN 104617805 A CN104617805 A CN 104617805A CN 201510091630 A CN201510091630 A CN 201510091630A CN 104617805 A CN104617805 A CN 104617805A
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Abstract
The invention provides a novel main power circuit which comprises a three-phase full-bridge circuit, an energy storage circuit and a braking circuit, wherein the three-phase full-bridge circuit is used for controlling the on/off of a power switch according to a timing sequence calculated by using a control chip to operate an SVPWM algorithm and inverting DC bus voltage into three-phase AC voltage so as to control the three-phase current of a motor; the energy storage circuit is used for absorbing transient voltage in the power circuit, and providing stored electric energy for the power circuit when the power circuit needs peak voltage; the braking circuit is used for consuming electric energy of bus pumping-up when bus voltage rises; the three-phase full-bridge circuit, the energy storage circuit and the braking circuit are connected in parallel with a servo motive power supply for providing bus voltage for the power circuit. The novel main power circuit provided by the invention solves the problems of large power voltage fluctuation, violent current change, resonance and the like, thereby ensuring that a servo system works stably.
Description
Technical field
The present invention relates to electromechanical servo control technology field, particularly a kind of new power main circuit.
Background technology
Along with the develop rapidly of power electronic technology, rare earth permanent-magnetic material and control theory, the problems such as the control that previously always annoying AC servomotor is complicated, speed adjusting performance is poor all achieve breakthrough progress, AC servo performance is day by day improved, price reduces further, AC servo progressively replaces DC servomechanism, especially in the servo-drive field of high accuracy, high performance requirements, permagnetic synchronous motor (PMSM) is progressively replacing stepping motor, direct current machine and become the developing direction of servo-drive.
For the control of permagnetic synchronous motor, usually there are two kinds of modes.Be the Hysteresis control for Current Control, another kind is voltage control.Hysteresis control fast response time, is mainly used in analogue enlargement; Voltage-controlled theoretical foundation is that space vector PWM controls, and this control mode improves the voltage fan-out capability of inverter, can keep constant switching frequency, controls so be very suitable for digital signal processor (DSP).Therefore be widely applied in practice.But under this control method, power tube is operated in the pattern of HF switch, the problems such as power voltage fluctuates greatly, electric current violent change, resonance can be caused.
Summary of the invention
(1) technical problem that will solve
The invention provides a kind of new power main circuit, the problem effectively reducing busbar voltage fluctuation can be solved.
(2) technical scheme
To achieve these goals, the invention provides one
A kind of new power main circuit of the present invention, comprise: three phase full bridge circuit, accumulator, and braking circuit, wherein, power switch pipe in described three phase full bridge circuit is reverse into three-phase alternating voltage DC bus-bar voltage, thus control the three-phase current of motor, described accumulator is for absorbing the transient voltage in described power circuit, and when described power circuit needs crest voltage, for described power circuit provides the electric energy of storage, described braking circuit is used for when busbar voltage rises, consume electric energy, maintaining busbar voltage is in preset range, described three phase full bridge circuit, described accumulator, and described braking circuit is parallel to as described power circuit provides the servo power power supply of busbar voltage.
Preferably, also comprise: absorbing circuit, it is in parallel with described three phase full bridge circuit, described accumulator and described braking circuit, the surge produced during for controlling power switch pipe shutoff and diode recovery.
Preferably, also comprise: soft starting circuit, it is connected with the described three phase full bridge circuit be in parallel, described accumulator, described braking circuit and described absorbing circuit, for slowing down speed and the intensity of described accumulator charging current.
Preferably, described three phase full bridge circuit comprises:
6 power switch pipes, for controlling motor three-phase current according to command signal.
And corresponding 6 fly-wheel diodes, for providing current path when described power switch pipe turns off.
Wherein, one in the emitter and collector of described power switch pipe is connected with in the positive pole of described fly-wheel diode and negative pole, and another in positive pole with described fly-wheel diode of another in the emitter and collector of described power switch pipe and negative pole is connected.
Wherein, described 6 power switch pipes are divided into 3 groups, and often organize 2 power switch pipes and be in series, 3 groups of power switch pipes are in parallel.
Preferably, described accumulator comprises storage capacitor.
Preferably, described braking circuit comprises the bleed off resistance and by-pass switch that are in series, and when the voltage of described bus " pump liter " exceedes set point, described by-pass switch is connected, and described busbar voltage is by described bleed off conductive discharge; When described busbar voltage is less than or equal to described set point, described by-pass switch disconnects.
Preferably, described absorbing circuit comprises the 3rd resistance, fast recovery diode and the second electric capacity, and described 3rd resistance and described fast recovery diode are in parallel, described 3rd resistance be in parallel and described fast recovery diode and described second capacitances in series.
Preferably, described soft starting circuit comprises the first switch, second switch and current-limiting resistance, and described second switch is connected with described current-limiting resistance, the described second switch be in series and described current-limiting resistance and described first switch in parallel; When described power circuit powers on, described first switch disconnects, and described second switch is connected, carry out current limliting by described current-limiting resistance, when the voltage rise of described power circuit is to predetermined value, disconnect described second switch, connect described first switch, carry out normal power supply.
(3) beneficial effect
New power main circuit provided by the invention, solves the problems such as power voltage fluctuation is large, electric current violent change, resonance, thus ensures servo system working stability.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
With reference to the accompanying drawings and further describe the present invention in conjunction with example.Wherein:
Fig. 1 shows the schematic diagram of new power main circuit of the present invention;
Label declaration: S1-servo power power supply, T1-first switch, T2-second switch, T3-by-pass switch, R1-current-limiting resistance, R2-bleed off resistance, R3-the 3rd resistance, C1-storage capacitor, C2-second electric capacity, P1-first power switch pipe, P2-second power switch pipe, P3-the 3rd power switch pipe, P4-the 4th power switch pipe, P5-the 5th power switch pipe, P6-the 6th power switch pipe, D1-first fly-wheel diode, D2-second fly-wheel diode, D3-the 3rd fly-wheel diode, D4-the 4th fly-wheel diode, D5-the 5th fly-wheel diode, D6-the 6th fly-wheel diode, D7-fast recovery diode.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, the invention provides a kind of new power main circuit, comprising: three phase full bridge circuit, accumulator and braking circuit, three is parallel to as described power circuit provides the servo power power supply S1 of busbar voltage.
Wherein, described three phase full bridge circuit is the core of described power circuit, and it is used for the sequential calculated according to control chip operation SVPWM algorithm for three phase full bridge circuit, control power switch pipe break-make, DC bus-bar voltage is reverse into three-phase alternating voltage, thus controls the three-phase current of motor.
According to this embodiment, described three phase full bridge circuit comprises: 6 MOSFET power switch pipe P1 ~ P6, for the PWM Duty ratio control motor three-phase current calculated according to control chip; And corresponding 6 sustained diode 1 ~ D6, for providing current path when described power switch pipe turns off; Wherein, one in the emitter and collector of described power switch pipe P1 ~ P6 is connected with in the positive pole of described sustained diode 1 ~ D6 and negative pole, and another in positive pole with described sustained diode 1 ~ D6 of another in the emitter and collector of described power switch pipe P1 ~ P6 and negative pole is connected; Wherein, described 6 power switch pipe P1 ~ P6 are divided into 3 groups, and often organize 2 power switch pipes and be in series, 3 groups of power switch pipes are in parallel.
Wherein, described accumulator for absorbing the transient voltage in described power circuit, and when described power circuit needs crest voltage, for described power circuit provides the electric energy of storage.
According to this embodiment, described accumulator comprises storage capacitor C1, and when needs peak current, electric capacity C1 discharges electric energy.
When the rotating speed of motor is by when regulating to low speed at a high speed or stop, motor will as generator effect, and now busbar voltage will rise.Therefore, described braking circuit is used for when busbar voltage rises, and consumes the electric energy of bus " pump liter ".
According to this embodiment, described braking circuit comprises the bleed off resistance R2 and by-pass switch T3 that are in series, when the voltage of described bus " pump liter " exceedes set point, by control end, described by-pass switch T3 is connected, described busbar voltage is discharged by described bleed off resistance R2; When described busbar voltage is less than or equal to described set point, described by-pass switch T3 disconnects.Braking time is relevant with bleed off resistance value with the voltage of " pump liter " on bus.The voltage of bus " pump liter " is higher, and braking time is longer; Bleed off resistance value is larger, and braking time is longer.
According to embodiment provided by the invention, described power circuit can also comprise: absorbing circuit, it is in parallel with described three phase full bridge circuit, described accumulator and described braking circuit, the surge produced during for controlling power switch pipe shutoff and diode recovery.Power switch pipe, when HF switch, owing to turning off the impact of surge and diode recovery surge, can produce very high transient voltage at P, N two ends of power switch pipe, may exceed withstand voltage and damage IPM in extreme circumstances.The surge that the effect of absorbing circuit produces when being exactly and controlling shutoff and diode recovery, with the safe and reliable operation of protection device.
According to this embodiment, described absorbing circuit comprises the 3rd resistance R3, fast recovery diode D7 and the second electric capacity C2, described 3rd resistance R3 and described fast recovery diode D7 is in parallel, and the described 3rd resistance R3 be in parallel and described fast recovery diode D7 connects with described second electric capacity C2.In small-power main loop design, pure condenser network is the low and effective circuit controlling transient voltage of a kind of cost.But when power increases, due to the effect of major loop stray inductance, circuit will produce resonance.At this moment, we should use RDC circuit, and the fast recovery diode D7 in circuit can effective nip transient voltage, suppresses resonance.Its RC time constant should be about 1/3 of switch periods.
According to embodiment provided by the invention, described power circuit can also comprise: soft starting circuit, it is connected with the described three phase full bridge circuit be in parallel, described accumulator, described braking circuit and described absorbing circuit, for slowing down speed and the intensity of described accumulator charging current.Under normal operation, storage capacitor value is larger, and the voltage dithering on bus is less.But capacitance is larger, its impedance is also less.The moment that described power circuit powers on, will sharply be risen by the electric current of electric capacity, may by the device failure of incoming line front end.A soft starting circuit of connecting in bus can slow down speed and the intensity of capacitance charging current.
According to this embodiment, described soft starting circuit comprises the first switch T1, second switch T2 and current-limiting resistance R1, described second switch T2 connects with described current-limiting resistance R1, and the described second switch T2 be in series and described current-limiting resistance R1 is in parallel with described first switch T1; When described power circuit powers on, electric current sharply rises, this moment makes described first switch T1 disconnect by control end, described second switch T2 connects, and carry out current limliting by described current-limiting resistance R1, current-limiting resistance R1 assume responsibility for most of electric current, when the voltage rise of described power circuit is to predetermined value, disconnect described second switch T2, connect described first switch T1, carry out normal power supply.
Claims (8)
1. a new power main circuit, is characterized in that, comprising: three phase full bridge circuit, accumulator and braking circuit, wherein,
Power switch pipe in described three phase full bridge circuit is reverse into three-phase alternating voltage DC bus-bar voltage, thus controls the three-phase current of motor;
Described accumulator for absorbing the transient voltage in described power circuit, and when described power circuit needs crest voltage, for described power circuit provides the electric energy of storage;
Described braking circuit is used for when busbar voltage rises, and consumes electric energy, maintains busbar voltage and is in preset range;
Described three phase full bridge circuit, described accumulator and described braking circuit are parallel to as described power circuit provides the servo power power supply of busbar voltage.
2. new power main circuit as claimed in claim 1, it is characterized in that, also comprise: absorbing circuit, it is in parallel with described three phase full bridge circuit, described accumulator and described braking circuit, the surge produced during for controlling power switch pipe shutoff and diode recovery.
3. new power main circuit as claimed in claim 2, it is characterized in that, also comprise: soft starting circuit, it is connected with the described three phase full bridge circuit be in parallel, described accumulator, described braking circuit and described absorbing circuit, for slowing down speed and the intensity of described accumulator charging current.
4. the new power main circuit as described in any one of claims 1 to 3, is characterized in that, described three phase full bridge circuit comprises:
6 power switch pipes, for controlling motor three-phase current according to command signal;
And corresponding 6 fly-wheel diodes, for providing current path when described power switch pipe turns off;
Wherein, one in the emitter and collector of described power switch pipe is connected with in the positive pole of described fly-wheel diode and negative pole, and another in positive pole with described fly-wheel diode of another in the emitter and collector of described power switch pipe and negative pole is connected;
Wherein, described 6 power switch pipes are divided into 3 groups, and often organize 2 power switch pipes and be in series, 3 groups of power switch pipes are in parallel.
5. the new power main circuit as described in any one of claims 1 to 3, is characterized in that, described accumulator comprises storage capacitor.
6. the new power main circuit as described in any one of claims 1 to 3, it is characterized in that, described braking circuit comprises the bleed off resistance and by-pass switch that are in series, when the voltage of described bus " pump liter " exceedes set point, described by-pass switch is connected, and described busbar voltage is by described bleed off conductive discharge; When described busbar voltage is less than or equal to described set point, described by-pass switch disconnects.
7. new power main circuit as claimed in claim 2 or claim 3, it is characterized in that, described absorbing circuit comprises the 3rd resistance, fast recovery diode and the second electric capacity, described 3rd resistance and described fast recovery diode are in parallel, described 3rd resistance be in parallel and described fast recovery diode and described second capacitances in series.
8. new power main circuit as claimed in claim 3, it is characterized in that, described soft starting circuit comprises the first switch, second switch and current-limiting resistance, described second switch is connected with described current-limiting resistance, the described second switch be in series and described current-limiting resistance and described first switch in parallel; When described power circuit powers on, described first switch disconnects, and described second switch is connected, carry out current limliting by described current-limiting resistance, when the voltage rise of described power circuit is to predetermined value, disconnect described second switch, connect described first switch, carry out normal power supply.
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| CN201510091630.9A CN104617805A (en) | 2015-02-28 | 2015-02-28 | Novel main power circuit |
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| CN201510091630.9A CN104617805A (en) | 2015-02-28 | 2015-02-28 | Novel main power circuit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108540022A (en) * | 2018-05-03 | 2018-09-14 | 张懿 | A kind of method and device for inhibiting brshless DC motor to be judged by accident without sensor commutation |
| CN108551281A (en) * | 2018-05-03 | 2018-09-18 | 张懿 | A kind of method and device of the accurate commutation of brshless DC motor |
| CN108880205A (en) * | 2017-05-10 | 2018-11-23 | 美国亚德诺半导体公司 | System and method for controlling electric current during energization |
| CN109787298A (en) * | 2019-03-18 | 2019-05-21 | 合肥为民电源有限公司 | A kind of current transformer and its control method |
| CN109861573A (en) * | 2019-03-07 | 2019-06-07 | 苏州赛得尔智能科技有限公司 | A kind of low switching losses power inverter |
| CN109921652A (en) * | 2019-03-12 | 2019-06-21 | 广东美的制冷设备有限公司 | Motor feed circuit and household electrical appliance with it |
| CN110481353A (en) * | 2019-08-13 | 2019-11-22 | 科华恒盛股份有限公司 | A kind of direct current relaxed starter and method |
| CN110581572A (en) * | 2018-06-07 | 2019-12-17 | 株洲中车时代电气股份有限公司 | Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment |
| CN111697810A (en) * | 2020-05-20 | 2020-09-22 | 惠州拓邦电气技术有限公司 | Slow start control device and method for high-power inverter |
| CN113471949A (en) * | 2021-07-05 | 2021-10-01 | 四川航天烽火伺服控制技术有限公司 | Capacitor charging and discharging circuit and electromechanical servo system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2511937Y (en) * | 2002-01-14 | 2002-09-18 | 华腾数控有限公司 | A.C. servo device for gun |
| CN101051814A (en) * | 2006-04-04 | 2007-10-10 | 上海雷诺尔电气有限公司 | Variable frequency speed regulator capable of supperssing producing resonant wave |
| CN102006007A (en) * | 2010-12-10 | 2011-04-06 | 深圳市航盛电子股份有限公司 | Motor control system of electric automobile |
| CN103515977A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Single-phase integral energy feedback device |
| CN204119051U (en) * | 2014-07-22 | 2015-01-21 | 北京首聚能源科技发展有限公司 | A kind of low voltage frequency converter |
-
2015
- 2015-02-28 CN CN201510091630.9A patent/CN104617805A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2511937Y (en) * | 2002-01-14 | 2002-09-18 | 华腾数控有限公司 | A.C. servo device for gun |
| CN101051814A (en) * | 2006-04-04 | 2007-10-10 | 上海雷诺尔电气有限公司 | Variable frequency speed regulator capable of supperssing producing resonant wave |
| CN102006007A (en) * | 2010-12-10 | 2011-04-06 | 深圳市航盛电子股份有限公司 | Motor control system of electric automobile |
| CN103515977A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Single-phase integral energy feedback device |
| CN204119051U (en) * | 2014-07-22 | 2015-01-21 | 北京首聚能源科技发展有限公司 | A kind of low voltage frequency converter |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880205A (en) * | 2017-05-10 | 2018-11-23 | 美国亚德诺半导体公司 | System and method for controlling electric current during energization |
| CN108540022A (en) * | 2018-05-03 | 2018-09-14 | 张懿 | A kind of method and device for inhibiting brshless DC motor to be judged by accident without sensor commutation |
| CN108551281A (en) * | 2018-05-03 | 2018-09-18 | 张懿 | A kind of method and device of the accurate commutation of brshless DC motor |
| CN110581572A (en) * | 2018-06-07 | 2019-12-17 | 株洲中车时代电气股份有限公司 | Energy absorption device and subway regenerative braking energy hybrid energy absorption equipment |
| CN109861573A (en) * | 2019-03-07 | 2019-06-07 | 苏州赛得尔智能科技有限公司 | A kind of low switching losses power inverter |
| CN109921652A (en) * | 2019-03-12 | 2019-06-21 | 广东美的制冷设备有限公司 | Motor feed circuit and household electrical appliance with it |
| CN109787298A (en) * | 2019-03-18 | 2019-05-21 | 合肥为民电源有限公司 | A kind of current transformer and its control method |
| CN110481353A (en) * | 2019-08-13 | 2019-11-22 | 科华恒盛股份有限公司 | A kind of direct current relaxed starter and method |
| CN111697810A (en) * | 2020-05-20 | 2020-09-22 | 惠州拓邦电气技术有限公司 | Slow start control device and method for high-power inverter |
| CN113471949A (en) * | 2021-07-05 | 2021-10-01 | 四川航天烽火伺服控制技术有限公司 | Capacitor charging and discharging circuit and electromechanical servo system |
| CN113471949B (en) * | 2021-07-05 | 2023-08-25 | 四川航天烽火伺服控制技术有限公司 | Capacitor charge-discharge circuit and electromechanical servo system |
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Application publication date: 20150513 |