CN208461688U - A kind of electric machine controller charge/discharge control circuit - Google Patents
A kind of electric machine controller charge/discharge control circuit Download PDFInfo
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- CN208461688U CN208461688U CN201820452466.9U CN201820452466U CN208461688U CN 208461688 U CN208461688 U CN 208461688U CN 201820452466 U CN201820452466 U CN 201820452466U CN 208461688 U CN208461688 U CN 208461688U
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Abstract
The utility model discloses a kind of electric machine controller charge/discharge control circuits, including discharge signal transmission circuit, switching circuit and discharge circuit；Switching circuit is connect with discharge signal transmission circuit and discharge circuit respectively, discharge circuit is also connect with bus anode, the input terminal of discharge signal transmission circuit and the discharge signal output pin of electric machine controller connect, the output end of discharge signal transmission circuit is connect with bus cathode, discharge signal transmission circuit, discharge signal outputs control signals to switching circuit based on the received；Switching circuit, with bus anode, bus cathode is connected with the output end of discharge signal transmission circuit, is discharged after switching circuit is connected according to the control signal received through discharge circuit.The electric machine controller charge/discharge control circuit of the present embodiment can be realized actively electric discharge rapidly, avoids high pressure leakage danger, ensure that electric machine controller safety.
Description
Technical field
The utility model relates to electric vehicle motor controller technical fields, and in particular to a kind of electric machine controller electric discharge control
Circuit processed.
Background technique
Electric machine controller is mainly converted the high voltage direct current of power battery on electric car by three-phase inverting circuit
Power supply is provided for motor for three-phase alternating current, and then provides power for the operation of automobile.In electric machine controller of today, to electricity
It has been indispensable for holding the use of element, therefore the action process of capacitor can also have an impact the overall performance of circuit, special
It is not the use for larger capacitance, if being limited to controller inner space and discharge resistance power only with passive electric discharge
Limitation, discharge time is longer, and there are high pressure leakage is dangerous.
Utility model content
The utility model provides a kind of electric machine controller charge/discharge control circuit, to solve electric machine controller discharge time
Long, there are the dangerous technical problems of high pressure leakage.
One aspect according to the present utility model provides a kind of electric machine controller charge/discharge control circuit, comprising: electric discharge letter
Number transmission circuit, switching circuit and discharge circuit；
Switching circuit is connect with the discharge signal transmission circuit and the discharge circuit respectively；
The discharge circuit is also connect with bus anode,
The input terminal of the discharge signal transmission circuit and the discharge signal output pin of electric machine controller connect, described to put
The output end of electric signal transmission circuit is connect with bus cathode,
The discharge signal transmission circuit, discharge signal outputs control signals to the switching circuit based on the received；
The switching circuit, with bus anode, bus cathode is connected with the output end of the discharge signal transmission circuit, root
It discharges after switching circuit is connected according to the control signal received through the discharge circuit.
Optionally, the discharge signal transmission circuit includes: photo-coupler and filter circuit；
Filter circuit includes the first filter capacitor, the second filter resistance and the second filter capacitor；
The input anode pin of photo-coupler is connect with the discharge signal output pin, the discharge signal output pin
Also it is connect with the electric machine controller；
The input negative pin of photo-coupler is grounded,
The signal output negative pole of photo-coupler is connect with one end of the first filter capacitor and bus cathode；
The signal output cathode of photo-coupler and the other end of the first filter capacitor, one end connection of the second filter resistance,
The other end of second filter resistance is connect with the control terminal of one end of the second filter capacitor and switching circuit,
The other end of second filter capacitor is connect with bus cathode.
Optionally, the switching circuit includes: triode, metal-oxide-semiconductor and the 7th divider resistance being sequentially connected in series, and the 8th point
Piezoresistance, the 9th divider resistance, the tenth divider resistance, the 11st divider resistance, the 12nd divider resistance, the 13rd partial pressure electricity
Resistance, the 14th divider resistance, the 15th divider resistance, the 16th divider resistance and the 17th divider resistance；
The base stage of triode is connect with the signal output cathode of the photo-coupler,
One end of the emitter of triode and the 16th divider resistance, one end of the 17th divider resistance and
The grid of metal-oxide-semiconductor connects,
The collector of triode is connect after connecting with the other end of the 17th divider resistance with bus cathode；
The source electrode of the metal-oxide-semiconductor is connect with bus cathode, and the drain electrode of the metal-oxide-semiconductor is connect with discharge circuit.
Optionally, switching circuit further include: third capacitor and diode；
The emitter of one end and the triode of one end of the third capacitor and the 17th divider resistance connects
It connects,
The other end of the third capacitor and the other end of the 17th divider resistance and the current collection of the triode
Pole connection,
The cathode of the diode is connect with the grid of one end of the 17th divider resistance and metal-oxide-semiconductor；
After the anode of the diode is connect with the source electrode of the other end of the 17th divider resistance and the metal-oxide-semiconductor
It is connect with bus cathode.
Optionally, discharge circuit includes: third discharge resistance in parallel, the 4th discharge resistance, the 5th discharge resistance and the
Six discharge resistances；
One end of 5th discharge resistance is connect with the drain electrode of the metal-oxide-semiconductor；
The other end of 5th discharge resistance is connect with bus anode.
Optionally, the third discharge resistance, the 4th discharge resistance, the resistance value of the 5th discharge resistance and the 6th discharge resistance
It is 110 ohm.
Optionally, the model of photo-coupler are as follows: ACPL-K30T-000E.
The beneficial effects of the utility model are: this electric machine controller charge/discharge control circuit packet of the utility model embodiment
Include discharge signal transmission circuit, switching circuit and discharge circuit；Discharge signal transmission circuit, discharge signal is defeated based on the received
Signal is controlled out to switching circuit；Switching circuit, through discharge circuit after switching circuit is connected according to the control signal received
Electric discharge, avoids the generation of high pressure disclosure risk, achieves once being in an emergency, can carry out in a short time to capacitor
The beneficial effect of electric discharge.And circuit is simple, at low cost, facilitates large-scale promotion application.
Detailed description of the invention
Fig. 1 is the schematic diagram of the electric machine controller charge/discharge control circuit of the utility model one embodiment；
Fig. 2 is the maximum power of the discharge resistance of the utility model one embodiment and the graph of relation of overload time.
Specific embodiment
The design concept of the utility model is: putting for existing for the passive discharge circuit of electric machine controller in the prior art
The electric time is long, there is a problem of high pressure leakage danger, the utility model embodiment provides a kind of active discharge control circuit, leads to
Overdischarge signal circuit receive electric machine controller output discharge signal and control switch circuit conducting after through discharge circuit
Electric discharge, once being in an emergency, can in a short time carry out capacitor so as to avoid the generation of high pressure disclosure risk
Electric discharge, circuit is simple, and intelligence degree is high, ensure that the safety of electric machine controller.
The electric machine controller charge/discharge control circuit of the present embodiment, comprising: discharge signal transmission circuit and is put switching circuit
Circuit；
Switching circuit is connect with the discharge signal transmission circuit and the discharge circuit respectively；
The discharge circuit is also connect with bus anode,
The input terminal of the discharge signal transmission circuit and the discharge signal output pin of electric machine controller connect, described to put
The output end of electric signal transmission circuit is connect with bus cathode,
The discharge signal transmission circuit, discharge signal outputs control signals to the switching circuit based on the received；
The switching circuit, with bus anode, bus cathode is connected with the output end of the discharge signal transmission circuit, root
It discharges after switching circuit is connected according to the control signal received through the discharge circuit.
Fig. 1 is the schematic diagram of the electric machine controller charge/discharge control circuit of the utility model one embodiment；In conjunction with Fig. 1 to this
The electric machine controller charge/discharge control circuit of embodiment is illustrated.
Referring to Fig. 1, discharge signal transmission circuit includes: photo-coupler U1 and filter circuit；
Filter circuit includes the first filter capacitor C1, the second filter resistance R2 and the second filter capacitor C2；
The input anode pin (i.e. AN pin) of photo-coupler U1 is connect with the discharge signal output pin PWM_DIS,
The discharge signal output pin PWM_DIS is also connect with the electric machine controller (not shown in figure 1)；
The input negative pin (CA pin) of photo-coupler U1 is grounded,
The signal output negative pole (VO-) of photo-coupler U1 and one end of the first filter capacitor C1 and bus cathode HV_NEG
Connection；
The other end of the signal output cathode VO+ of photo-coupler U1 and the first filter capacitor C1, the second filter resistance R2's
One end connection, control terminal (this of one end and switching circuit of the other end of the second filter resistance R2 and the second filter capacitor C2
It is the base stage of triode Q2 in embodiment) connection, referring to the optocoupler time pole output pin G A BOT signal wire and three in Fig. 1
The connection of pole pipe base stage.
The other end of the second filter capacitor C2 is connect with bus cathode HV_NEG.
Referring to Fig. 1, the normally closed pin (NC) of four of photo-coupler U1 does not connect with any point in circuit.Optocoupler it is main
Effect is isolation high pressure and low pressure, plays the role of protecting circuit.In the present embodiment, the model of photo-coupler are as follows: ACPL-
K30T-000E。
Optocoupler is not necessarily to additional power supply, saves cost, simplifies circuit.
Referring to Fig. 1, switching circuit includes: triode Q2, metal-oxide-semiconductor Q1 and the 7th divider resistance R7 being sequentially connected in series, and
Eight divider resistance R8, the 9th divider resistance R9, the tenth divider resistance R10, the 11st divider resistance R11, the 12nd divider resistance
R12, the 13rd divider resistance R13, the 14th divider resistance R14, the 15th divider resistance R15, the 16th divider resistance R16 and
17th divider resistance R17；
The base stage (i.e. pin 1) of triode Q2 is connect with the signal output cathode VO+ of photo-coupler U1,
One end of emitter (i.e. the pin 3) and the 16th divider resistance R16 of triode Q2, the 17th divider resistance R17
One end and metal-oxide-semiconductor Q1 grid (i.e. pin 1) connection,
The collector (i.e. pin 2) of triode Q2 connect with the other end of the 17th divider resistance R17 after with bus cathode
HV_NEG connection；
The source electrode (i.e. pin 3) of metal-oxide-semiconductor Q1 is connect with bus cathode HV_NEG, the drain electrode (i.e. pin 2) of the metal-oxide-semiconductor Q1
It is connect with discharge circuit.
It is worked normally for protection MOS switch pipe, the switching circuit of the present embodiment further include: third capacitor C3 and diode
D1；
One end of third capacitor C3 is connect with the emitter of one end of the 17th divider resistance R17 and triode Q2,
The collector of the other end of third capacitor C3 and the other end of the 17th divider resistance R17 and triode Q2 connects
It connects,
The cathode of diode D1 is connect with the grid of one end of the 17th divider resistance R17 and metal-oxide-semiconductor Q1；
Diode D1 anode connect with the source electrode of the other end of the 17th divider resistance R17 and metal-oxide-semiconductor Q1 after with mother
The HV_NEG connection of line cathode.
Here bus refers to the high voltage bus of the battery for electric machine controller power supply.
Referring to Fig. 1, discharge circuit includes: third discharge resistance R3 in parallel, the 4th discharge resistance R4, the 5th discharge resistance
45 and the 6th discharge resistance R6；
One end of 5th discharge resistance R5 is connect with the drain electrode of metal-oxide-semiconductor Q1；
The other end of 5th discharge resistance R5 is connect with bus anode HV_POS.
In the present embodiment, third discharge resistance R3, the 4th discharge resistance R4, the 5th discharge resistance R5 and the 6th electric discharge electricity
The resistance value for hindering R6 is 110 ohm.
It should be noted that the design of the quantity and resistance value of discharge resistance is discharge circuit key, this is stressed below
The quantity of the resistance of embodiment and the design process of resistance value.
Due to controller volumetric constraint and mounting means etc., the present embodiment selects LTO100 automobile certification grade serial discharge electricity
Resistance, pressure resistance are 500V, and rated power is 100W@25T C.From pressure resistance and heat dissipation security consideration, charge/discharge control circuit at least two
A LTO100 is used in series.
When discharging into 60V from 500V in electric machine controller to be realized 1 second, dc-link capacitance value is 1000uF, resistance value
It is as follows with heat dissipation calculation formula:
Be calculated: the Ω of R=471.6 Ω, i.e. R < 471.6 can guarantee discharge time control within 1 second.According to resistance value system
Column standard selects the resistance of two 200 Ω, the maximum discharge power of resistance are as follows:
It is found that the maximum power that each resistance need to consume is 312.5W power or corresponding energy.
Referring to fig. 2, as shown in Figure 2, power is the resistance of 312.5W, and overload time is about 100ms, for safety,
If electric machine controller detects that DC bus-bar voltage does not decline in a certain range in 50ms, active discharge metal-oxide-semiconductor is closed
It is disconnected, LTO100 peak power requirements can be met as a result,.
At this point, the actual discharge time are as follows:
Illustrate the calculating of rated power below: it is assumed that the shell temperature of electric machine controller be 85 DEG C (when coolant water temperature is 85 DEG C, nothing
Safe clearance), the junction temperature of LTO100 is 175 DEG C, and thermal resistance is R th (J-C)=1.5 (C/W), after LTO100 coats heat-conducting silicone grease
It is mounted on shell, the thermal resistance of heat-conducting silicone grease is R th (C-H)=1 (C/W), the then rated power that LTO100 can be born are as follows:
1000uF dc-link capacitance is from the energy that 500V discharges into 60V
Practical rated power are as follows:
As it can be seen that each resistance needs to consume the rated power of 72.5W, be unsatisfactory for most 36W can tolerance range, need to change
At four resistance series connection operational versions, the requirement of 36W is still greater than in each resistance consumption 36.25W, so needing to extend electric discharge
Between time to 0.85~1 second, as a result, according to 1% resistor series standard, the resistance of four 110 Ω is selected, then when actual discharge
Between are as follows:
The peak power of each resistance consumption is 142W, is met the requirements, to may be selected to detect after 1 discharge cycle straight
Whether stream busbar voltage is reduced to 60V or is greatly lowered, if not having, closes metal-oxide-semiconductor.At this moment rated power are as follows:
The rated power of each resistance consumption is 33W, is less than 36W.
Accordingly, it can be determined that the resistance for four 110 Ω is used in series, as discharge resistance.Corresponding maximum discharge current
Are as follows:
From the foregoing, it will be observed that the present embodiment is used in series by four resistance, electric discharge rapidly is realized in a short time, ensure that
The safety of electric machine controller.
In conclusion the electric machine controller charge/discharge control circuit of the present embodiment avoids the generation of high pressure disclosure risk, take
It obtained and was once in an emergency, the beneficial effect that can be discharged in a short time capacitor.And circuit is simple, cost
It is low, facilitate large-scale promotion application.
Above description is only a specific implementation of the present invention, under the above-mentioned introduction of the utility model, this field
Technical staff can carry out other improvement or deformation on the basis of the above embodiments.It will be understood by those skilled in the art that
Above-mentioned specific descriptions only preferably explain the purpose of this utility model, and the protection scope of the utility model is with claim
Subject to protection scope.
Claims (7)
1. a kind of electric machine controller charge/discharge control circuit characterized by comprising discharge signal transmission circuit, switching circuit with
And discharge circuit；
Switching circuit is connect with the discharge signal transmission circuit and the discharge circuit respectively；
The discharge circuit is also connect with bus anode；
The input terminal of the discharge signal transmission circuit and the discharge signal output pin of electric machine controller connect, the electric discharge letter
The output end of number transmission circuit is connect with bus cathode；
The discharge signal transmission circuit, discharge signal outputs control signals to the switching circuit based on the received；
The switching circuit, with bus anode, bus cathode connects with the output end of the discharge signal transmission circuit, according to connecing
The control signal received discharges after switching circuit is connected through discharge circuit.
2. electric machine controller charge/discharge control circuit according to claim 1, which is characterized in that the discharge signal transmission electricity
Road includes: photo-coupler and filter circuit；
Filter circuit includes the first filter capacitor, the second filter resistance and the second filter capacitor；
The input anode pin of photo-coupler is connect with the discharge signal output pin, the discharge signal output pin also with
The electric machine controller connection；
The input negative pin of photo-coupler is grounded,
The signal output negative pole of photo-coupler is connect with one end of the first filter capacitor and bus cathode；
The signal output cathode of photo-coupler and the other end of the first filter capacitor, one end connection of the second filter resistance are described
The other end of second filter resistance is connect with the control terminal of one end of the second filter capacitor and switching circuit,
The other end of second filter capacitor is connect with bus cathode.
3. electric machine controller charge/discharge control circuit according to claim 2, which is characterized in that the switching circuit includes:
Triode, metal-oxide-semiconductor and the 7th divider resistance being sequentially connected in series, the 8th divider resistance, the 9th divider resistance, the tenth point of piezoelectricity
Resistance, the 11st divider resistance, the 12nd divider resistance, the 13rd divider resistance, the 14th divider resistance, the 15th partial pressure electricity
Resistance, the 16th divider resistance and the 17th divider resistance；
The base stage of triode is connect with the signal output cathode of the photo-coupler,
One end of the emitter of triode and the 16th divider resistance, one end of the 17th divider resistance and MOS
The grid of pipe connects,
The collector of triode is connect after connecting with the other end of the 17th divider resistance with bus cathode；
The source electrode of the metal-oxide-semiconductor is connect with bus cathode, and the drain electrode of the metal-oxide-semiconductor is connect with discharge circuit.
4. electric machine controller charge/discharge control circuit according to claim 3, which is characterized in that switching circuit further include: the
Three capacitors and diode；
One end of the third capacitor is connect with the emitter of one end of the 17th divider resistance and the triode,
The collector of the other end and the triode of the other end of the third capacitor and the 17th divider resistance connects
It connects,
The cathode of the diode is connect with the grid of one end of the 17th divider resistance and metal-oxide-semiconductor；
The diode anode connect with the source electrode of the other end of the 17th divider resistance and the metal-oxide-semiconductor after with mother
The connection of line cathode.
5. electric machine controller charge/discharge control circuit according to claim 4, which is characterized in that discharge circuit includes: parallel connection
Third discharge resistance, the 4th discharge resistance, the 5th discharge resistance and the 6th discharge resistance；
One end of 5th discharge resistance is connect with the drain electrode of the metal-oxide-semiconductor；
The other end of 5th discharge resistance is connect with bus anode.
6. electric machine controller charge/discharge control circuit according to claim 5, which is characterized in that the third discharge resistance,
The resistance value of 4th discharge resistance, the 5th discharge resistance and the 6th discharge resistance is 110 ohm.
7. electric machine controller charge/discharge control circuit according to claim 2, which is characterized in that the model of the photo-coupler
Are as follows: ACPL-K30T-000E.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820452466.9U CN208461688U (en) | 2018-04-02 | 2018-04-02 | A kind of electric machine controller charge/discharge control circuit |
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|---|---|---|---|
| CN201820452466.9U CN208461688U (en) | 2018-04-02 | 2018-04-02 | A kind of electric machine controller charge/discharge control circuit |
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| CN208461688U true CN208461688U (en) | 2019-02-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429444A (en) * | 2018-04-02 | 2018-08-21 | 精进电动科技股份有限公司 | A kind of electric machine controller charge/discharge control circuit |
| CN110871688A (en) * | 2019-11-06 | 2020-03-10 | 北京动力源新能源科技有限责任公司 | Motor controller, motor driving system and new energy automobile |
-
2018
- 2018-04-02 CN CN201820452466.9U patent/CN208461688U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429444A (en) * | 2018-04-02 | 2018-08-21 | 精进电动科技股份有限公司 | A kind of electric machine controller charge/discharge control circuit |
| CN110871688A (en) * | 2019-11-06 | 2020-03-10 | 北京动力源新能源科技有限责任公司 | Motor controller, motor driving system and new energy automobile |
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