CN204103530U - A kind of electric capacity leadage circuit and electric machine controller - Google Patents
A kind of electric capacity leadage circuit and electric machine controller Download PDFInfo
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- CN204103530U CN204103530U CN201420427553.0U CN201420427553U CN204103530U CN 204103530 U CN204103530 U CN 204103530U CN 201420427553 U CN201420427553 U CN 201420427553U CN 204103530 U CN204103530 U CN 204103530U
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- leadage circuit
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- 230000005669 field effect Effects 0.000 claims abstract description 27
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model provides a kind of electric capacity leadage circuit and electric machine controller, and electric capacity leadage circuit comprises: the transformer be electrically connected with electric capacity to be discharged, by the rectifier of the voltage commutation after transformer transformation, resistance, be used for controlling switching tube that whether described leadage circuit start to discharge, the controller of break-make being used for control switch pipe, field effect transistor and be used for driving the power supply chip of described field effect transistor; Wherein, one end of electric capacity described in the termination of the same name on the former limit of transformer, the drain electrode of the different name termination field effect transistor on its former limit; Described rectifier, resistance and switching tube are connected between the Same Name of Ends of the secondary of transformer and different name end successively, and described controller connects the control end of described switching tube; The grid of described field effect transistor and source electrode connect described power supply chip simultaneously, and power supply chip is electrically connected with the other end of electric capacity simultaneously.The electric capacity leadage circuit that the utility model provides and electric machine controller cost is low and structure is simple.
Description
Technical field
The utility model relates to a kind of discharge circuit, particularly relates to a kind of electric capacity leadage circuit and electric machine controller.
Background technology
At present, need in increasing circuit to discharge to bulky capacitor, such as, its driving power of the pure electric vehicle of plurality at least all more than 40KW, the input voltage of drive motor controller is substantially all at more than 300V, and the large portion design of the dynamically filtering electric capacity required for controller is at more than 400UF.
Existing bulky capacitor leadage circuit main thought is that high voltage direct taps into capable releasing, such as, undertaken controlling (as Fig. 2) or high_voltage isolation direct current relay control (as Fig. 1) by high-voltage MOS pipe at a high side power PTC in parallel or high-voltage power resistance, and in the circuit that controlled by high-voltage MOS pipe of high-voltage power resistance, the power that its resistance bears when ceiling voltage is very large, when therefore selecting resistance, it compares and is difficult to select in volume and cost.And direct current relay is expensive especially on the market at present, its price is up to hundreds of unit, and no matter from volume cost, direct current relay is substantially all that 3 of general relay is accompanied above.So bulky capacitor leadage circuit or be not easy to select components and parts in prior art, or its cost is higher.
Be understandable that, the statement of this part only provides the background information relevant to the utility model, may form or not form so-called prior art.
Summary of the invention
Technical problem to be solved in the utility model be higher for bulky capacitor leadage circuit cost in prior art, be not easy to select the defect of components and parts, provide one to be convenient to select components and parts and cost is lower, the simple electric capacity leadage circuit of structure.
The utility model solves the technical scheme that its technical problem adopts and is to provide a kind of electric capacity leadage circuit, and it comprises: the transformer be electrically connected with electric capacity to be discharged, by the rectifier of the voltage commutation after transformer transformation, resistance, be used for controlling switching tube that whether described electric capacity leadage circuit start to discharge, the controller of break-make being used for control switch pipe, field effect transistor and be used for driving the power supply chip of described field effect transistor; Wherein, one end of electric capacity described in the termination of the same name on the former limit of transformer, the drain electrode of the different name termination field effect transistor on its former limit; Described rectifier, resistance and switching tube are connected between the Same Name of Ends of the secondary of transformer and different name end successively, and described controller connects the control end of described switching tube; The grid of described field effect transistor and source electrode connect described power supply chip simultaneously, and power supply chip is electrically connected with the other end of electric capacity simultaneously.
In above-mentioned electric capacity leadage circuit, described rectifier is diode, and the anode of described diode connects the Same Name of Ends of the secondary of transformer, and the negative electrode of diode connects the different name end of the secondary of transformer successively by resistance and switching tube.
In above-mentioned electric capacity leadage circuit, described switching tube is triode or field effect transistor, the grid of described switching tube or base stage connect described controller, the source electrode of switching tube or emitter connect the negative electrode of diode by described resistance, and the drain electrode of switching tube or collector electrode connect the different name end of the secondary of transformer.
In order to better solve the problems of the technologies described above, the utility model additionally provides a kind of electric machine controller, it comprises electric capacity to be discharged and for described electric capacity being carried out the electric capacity leadage circuit that energy is released, described electric capacity leadage circuit be in above-mentioned electric capacity leadage circuit any one.
In the electric capacity leadage circuit that the utility model provides, the high-tension electricity at bulky capacitor two ends can be reduced to low tension by power supply chip and after field effect transistor forms inverse-excitation type switch power-supply in conjunction with transformer by it, then holds the energy of releasing by the resistance consumption power down at transformer secondary place.Wherein, by the break-make of controller control switch pipe, electric discharge whether is started with control capacitance leadage circuit, because in the loop at transformer secondary place, voltage is lower, so this discharge loop does not need to isolate, and do not need to select high voltage bearing components and parts, therefore it can so that the selection of device, and common components and parts can be selected, and then greatly reduce the cost of whole leadage circuit and its structure is simple.
Accompanying drawing explanation
Fig. 1 is a kind of electric capacity leadage circuit of the prior art;
Fig. 2 is another electric capacity leadage circuit in prior art;
Fig. 3 is the principle assumption diagram of electric capacity leadage circuit in the embodiment that provides of the utility model.
Embodiment
The technical problem solved to make the utility model, technical scheme and beneficial effect are clearly understood, below in conjunction with drawings and Examples, are further elaborated to the utility model.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In description of the present utility model, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
The electric capacity leadage circuit that the utility model provides is mainly for the electric discharge of the larger bulky capacitor of capacity, shown in Figure 3, the electric capacity leadage circuit that the utility model provides mainly comprises: the transformer be electrically connected with electric capacity to be discharged, by the rectifier of the voltage commutation after transformer transformation, resistance, be used for switching tube that whether controlled discharge circuit start to discharge, the controller of break-make being used for control switch pipe, field effect transistor and be used for driving the power supply chip of field effect transistor.Wherein, one end of the termination capacitor of the same name on the former limit of transformer, the drain electrode of the different name termination field effect transistor on its former limit; Rectifier, resistance and switching tube are connected between the Same Name of Ends of the secondary of transformer and different name end successively, and controller connects the control end of switching tube; Grid and the source electrode of field effect transistor connect power supply chip simultaneously, and power supply chip is electrically connected with the other end of electric capacity simultaneously.The voltage at bulky capacitor (electric capacity namely to be discharged) two ends is usually higher, can be low-voltage by the voltage step-down at bulky capacitor two ends, namely consumed the voltage of electric capacity by low pressure drain by transformer.Concrete, consume by resistance the electric energy that electric capacity releases, and by the conducting of controller control switch pipe and shutoff, to control to select electric capacity leadage circuit whether to start electric discharge.Wherein, because electric capacity normally passes through direct-current discharge, therefore after exporting pulsed drive field effect transistor by power supply chip, it can form inverse-excitation type switch power-supply, and then transformer can carry out step-down, so that the voltage at bulky capacitor two ends is reduced to low pressure, then, the AC rectification that transformer secondary exports by rectifier is direct current, and the power consumption that electric capacity is released by resistance falls.Therefore, the rectifier of transformer secondary, resistance, switching tube and controller all can be selected to need high voltage bearing (selecting low-voltage device), it so that the selection of device, and can select the cost that greatly can reduce whole electric capacity leadage circuit during low-voltage device.
Preferably, rectifier is diode, and the anode of described diode connects the Same Name of Ends of the secondary of transformer, and the negative electrode of diode connects the different name end of the secondary of transformer successively by resistance and switching tube.So both can carry out rectification fast and its structure is simple, cost is lower.The field effect transistor that above-mentioned power supply chip drives is N-type, and it forms inverse-excitation type switch power-supply together with power supply chip, can carry out transformation to make transformer to the voltage at electric capacity two ends.The switching tube that above-mentioned transformer secondary connects can for triode or field effect transistor, whether starts electric discharge with control capacitance leadage circuit fast.The grid of switching tube or base stage connect described controller, and the source electrode of switching tube or emitter connect the negative electrode of diode by described resistance, and the drain electrode of switching tube or collector electrode connect the different name end of the secondary of transformer.What deserves to be explained is, for driving the power supply chip of field effect transistor to be well known to those skilled in the art, (such as, power supply chip exports pulse to drive field effect transistor), so the structure of power supply chip does not repeat them here.
The operation principle of the electric capacity leadage circuit that the utility model provides is described as follows in conjunction with embodiment illustrated in fig. 3:
In preferred embodiment shown in Fig. 3, switching tube is metal-oxide-semiconductor Q2, and rectifier is diode D1.Power supply chip and field effect transistor Q1 form inverse-excitation type switch power-supply, then direct current higher for electric capacity C1 two ends can be reduced to low pressure by transformer, power supply chip and field effect transistor Q1, therefore the voltage of the alternating current of transformer T1 secondary output is lower, then, this AC rectification is direct current by diode D1, described galvanic energy ezpenditure falls by resistance, namely achieves and is released by the energy at electric capacity two ends.And can fast the higher electric energy at bulky capacitor two ends be released like this.Concrete, the utility model also exports control signal with the whether conducting of control switch pipe by controller, and then whether the loop at controlling resistance place closes, and also namely whether control capacitance leadage circuit can start electric discharge, if switching tube closes, then the energy ezpenditure that resistance starts electric capacity to release falls.In the electric capacity leadage circuit that the utility model provides, due to transformer secondary output is lower voltage, therefore rectifier, resistance and switching tube all can select common electronic devices and components, and then the cost can avoiding selecting high voltage bearing device to bring is higher and be difficult to the trouble of selector.
Such as, electric capacity two ends input voltage is the rated voltage of 600V, and transformer and switch power supply chip are functionally 60V ~ 600V, and then the 12V voltage (according to different situations adjustable) making (according to different situations adjustable) secondary output of transformer constant; This 12V voltage can also be powered to controller, thus obtains control signal with the break-make of control switch pipe, and controller can be common single-chip microcomputer, and the controller of control switch pipe break-make is known for those skilled in the art, does not repeat them here.
In the electric capacity leadage circuit that the utility model provides, the voltage that transformer secondary can be made to export is constant voltage (size of the magnitude of voltage that secondary can certainly be regulated to export), because U is fixing low-tension supply (can regulate); Therefore the power of releasing in this electric capacity leadage circuit can be constant (P=U*U/R), simultaneously resistance and switching tube are all low pressure, all smaller on volume and cost.Wherein, Electronic Components ratio is easier to, as long as and height is pressed with electricity just can ensure that whole electric capacity leadage circuit normally works.And it is when circuit malfunction, and the power that resistance and switching tube bear is less, and whole circuit working is safer.The electric capacity leadage circuit that the utility model provides can be applied to and variously need in the circuit discharged to bulky capacitor, such as, and the electric machine controller on frequency converter, electric automobile.
The utility model additionally provides a kind of electric machine controller, and it comprises: electric capacity to be discharged and for described electric capacity being carried out the electric capacity leadage circuit that energy is released, and described electric capacity leadage circuit is any one in above-mentioned electric capacity leadage circuit.Such as, the power supply of current driving motor in electric automobile controller is substantially all " high pressure " electricity, and all adopts jumbo electric capacity as dynamically filtering effect inside electric machine controller; But because the capacitance of electric capacity is larger, time of releasing is slow, its be not easy to safeguard and safe not, and, when the contactor in automobile between battery and electric machine controller disconnects, below safe voltage of must within a certain period of time the magnitude of voltage at electric capacity two ends being released to.And the electric machine controller in the utility model can realize initiatively releasing by the electric capacity leadage circuit in it, therefore its use and maintenance is convenient and safe and reliable.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
In description of the present utility model, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. an electric capacity leadage circuit, it is characterized in that, comprising: the transformer be electrically connected with electric capacity to be discharged, by the rectifier of the voltage commutation after transformer transformation, resistance, be used for controlling switching tube that whether described electric capacity leadage circuit start to discharge, the controller of break-make being used for control switch pipe, field effect transistor and be used for driving the power supply chip of described field effect transistor;
Wherein, one end of electric capacity described in the termination of the same name on the former limit of transformer, the drain electrode of the different name termination field effect transistor on its former limit;
Described rectifier, resistance and switching tube are connected between the Same Name of Ends of the secondary of transformer and different name end successively, and described controller connects the control end of described switching tube;
The grid of described field effect transistor and source electrode connect described power supply chip simultaneously, and power supply chip is electrically connected with the other end of electric capacity simultaneously.
2. electric capacity leadage circuit as claimed in claim 1, it is characterized in that, described rectifier is diode, and the anode of described diode connects the Same Name of Ends of the secondary of transformer, and the negative electrode of diode connects the different name end of the secondary of transformer successively by resistance and switching tube.
3. electric capacity leadage circuit as claimed in claim 2, it is characterized in that, described switching tube is triode or field effect transistor, the grid of described switching tube or base stage connect described controller, the source electrode of switching tube or emitter connect the negative electrode of diode by described resistance, and the drain electrode of switching tube or collector electrode connect the different name end of the secondary of transformer.
4. electric capacity leadage circuit as claimed in claim 1, it is characterized in that, described field effect transistor is N-type.
5. an electric machine controller, is characterized in that, comprising: electric capacity to be discharged and for described electric capacity being carried out the electric capacity leadage circuit that energy is released, the electric capacity leadage circuit of described electric capacity leadage circuit according to any one of described Claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427553.0U CN204103530U (en) | 2014-07-31 | 2014-07-31 | A kind of electric capacity leadage circuit and electric machine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427553.0U CN204103530U (en) | 2014-07-31 | 2014-07-31 | A kind of electric capacity leadage circuit and electric machine controller |
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| Publication Number | Publication Date |
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| CN204103530U true CN204103530U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420427553.0U Expired - Lifetime CN204103530U (en) | 2014-07-31 | 2014-07-31 | A kind of electric capacity leadage circuit and electric machine controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114290905A (en) * | 2021-12-31 | 2022-04-08 | 银川威力传动技术股份有限公司 | Active discharge circuit of motor controller |
| CN116111818A (en) * | 2021-11-09 | 2023-05-12 | 比亚迪股份有限公司 | High-voltage bus capacitor discharge device and vehicle |
-
2014
- 2014-07-31 CN CN201420427553.0U patent/CN204103530U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116111818A (en) * | 2021-11-09 | 2023-05-12 | 比亚迪股份有限公司 | High-voltage bus capacitor discharge device and vehicle |
| CN114290905A (en) * | 2021-12-31 | 2022-04-08 | 银川威力传动技术股份有限公司 | Active discharge circuit of motor controller |
| CN114290905B (en) * | 2021-12-31 | 2024-05-24 | 银川威力传动技术股份有限公司 | Active discharging circuit of motor controller |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150114 |
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| CX01 | Expiry of patent term |