CN107069666A - Electric machine controller based on multi-point sampling current foldback circuit - Google Patents
Electric machine controller based on multi-point sampling current foldback circuit Download PDFInfo
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- CN107069666A CN107069666A CN201710427836.3A CN201710427836A CN107069666A CN 107069666 A CN107069666 A CN 107069666A CN 201710427836 A CN201710427836 A CN 201710427836A CN 107069666 A CN107069666 A CN 107069666A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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Abstract
Based on the electric machine controller of multi-point sampling current foldback circuit, belong to electronic circuit technology.Timer in voltage sample module samples motor working current, overcurrent protection module exports three enable signals in three timing nodes and controls analog-digital converter ADC that the output voltage V1 of voltage sample module is converted into corresponding data signal and be respectively stored into the first register, the second register and the 3rd register；And under the 3rd control for enabling signal enc, the data that first subtracter is stored up with the first registers subtract the data of the second registers storage, the data that second subtracter is stored up with the second registers subtract the data of the 3rd registers storage, the data that 3rd subtracter again exports the first subtracter subtract the data of the second subtracter output, the output signal of the 3rd obtained subtracter and by being input to drive module after logic circuit synthesis, drive module is by controlling electronic relay module being switched on and off so as to controlled motor.
Description
Technical field
The present invention relates to electronic circuit technology, a kind of electricity based on multi-point sampling current foldback circuit is particularly related to
Machine controller.
Background technology
Electronic relay is a kind of electronic control device, is commonly used in automatic control circuit, it be actually with compared with
Small electric current go control larger current one kind " automatic switch ", therefore play in circuit automatically adjust, safeguard protection, conversion electricity
Road etc. is acted on.At present, the overcurrent protection of motor mainly includes mechanical protection and electronic relay is protected.Wherein, mechanical protection is deposited
The shortcoming that can not ensure in low precision, reliability, although and electromagnetic relay with very high reliability, volume is big, consumption
Material is more, and price limit by copper, cost are higher.Compared with both the above protected mode, using electronic relay protection not
Only there is the advantages such as reliability is high, precision is good, and solve the Cost Problems that electromagnetic relay is influenceed by copper valency, with more
Wide application prospect.And lack the current foldback circuit to electronic relay in the prior art, it is possible to wound is caused to motor
Evil, therefore, the design for the current foldback circuit of electronic relay is particularly important.
The content of the invention
It is to be solved by this invention, proposed aiming at above-mentioned weak point a kind of based on multi-point sampling overcurrent protection electricity
The electric machine controller on road.
The technical scheme is that：
Based on the electric machine controller of multi-point sampling current foldback circuit, including electronic relay module, voltage sample module,
Overcurrent protection module and drive module, the output end connection motor of the electronic relay module, its earth terminal connect the electricity
Press the input of sampling module；The input of the overcurrent protection module connects the output end of the voltage sample module, and its is defeated
Go out end and pass through the control end that electronic relay module is connected after drive module；
The overcurrent protection module includes timer, analog-digital converter, the first register, the second register, the 3rd deposit
Device, the first subtracter, the second subtracter, the 3rd subtracter and logic circuit, the input of the analog-digital converter is as described
The input of current foldback circuit, its output end connects the input of the first register, the second register and the 3rd register；Institute
State timer and produce the first enable signal ena, the second enable signal enb and the 3rd enable signal enc, described first enables signal
Ena inputs the Enable Pin of the first register and analog-digital converter, and described second, which enables signal enb, inputs the second register and modulus
The Enable Pin of converter, the 3rd register of the 3rd enable signal enc inputs, analog-digital converter, the first subtracter, second subtract
The Enable Pin of musical instruments used in a Buddhist or Taoist mass and the 3rd subtracter；The subtracting input of first subtracter connects the output end of the first register, and it is subtracted
Number input connects the output end of the second register；The subtracting input of second subtracter connects the output end of the second register,
Its minuend input connects the output end of the 3rd register；The subtracting input of 3rd subtracter connects the defeated of the first subtracter
Go out end, its minuend input connects the output end of the second subtracter；The input of logic circuit connects the defeated of the 3rd subtracter
Go out end, its output end as the current foldback circuit output end.
Specifically, the drive module includes the first phase inverter, the second phase inverter, the 3rd phase inverter, the 4th phase inverter, the
One PMOS PM1, the second PMOS PM2, the second NMOS tube NM2, the 3rd NMOS tube NM3 and resistance R1,
The input of first phase inverter connects the output end of the overcurrent protection module, the output end connection of the 4th phase inverter
The control end of the electronic relay module；
The input of second phase inverter connects the output end of the first phase inverter and the second NMOS tube NM2 grid, and it is exported
The 3rd NMOS tube NM3 of end connection grid；
First PMOS PM1 the second NMOS tube NM2 of drain electrode connection drain electrode and the second PMOS PM2 grid, its grid
Pole connects the input of the second PMOS PM2 drain electrode, the 3rd NMOS tube NM3 drain electrode and the 3rd phase inverter, the second NMOS tube
NM2 and the 3rd NMOS tube NM3 source ground, the first PMOS PM1 and the second PMOS PM2 source electrode connect the power supply electricity of motor
Press VIN；
The input of 4th phase inverter connects the output end of the 3rd phase inverter, and resistance R1 is connected on the output end of the 4th phase inverter
Between ground.
Specifically, the electronic relay module includes the first NMOS tube NM1, the first NMOS tube NM1 grid is used as institute
The control end of electronic relay module is stated, its output end drained as the electronic relay module, its source electrode is as described
The earth terminal of electronic relay module.
Specifically, the electronic relay module is IGBT power models.
Specifically, the electronic relay module is GTO power models.
Specifically, the voltage sample module includes sampling resistor Rs and operational amplifier OPA, operational amplifier OPA's
Negative input is as the input of the voltage sample module, its positive input ground connection, and its output end is used as the voltage
The output end of sampling module, sampling resistor Rs is connected between the input of the voltage sample module and ground.
Specifically, under AC applications, the voltage sample module is by resistive-capacitive voltage divider module composition.
Specifically, under AC applications, the voltage sample module is made up of electric capacity series connection division module.
The present invention operation principle be：The operating current of voltage sample module samples motor, overcurrent protection module identification electricity
Whether machine occurs stall and controls being switched on and off for electronic relay module by drive module；Timer is set at first
Intermediate node output first enables signal ena control analog-digital converter ADC and is converted into the output voltage V1 of voltage sample module pair
The data signal answered simultaneously is stored to the first register, and signal enb control analog-to-digital conversions are enabled in the second timing node output second
The output voltage V1 of voltage sample module is converted into corresponding data signal and stored to the second register by device ADC, the 3rd
Timing node output the 3rd enables signal enc controls analog-digital converter ADC and is converted into the output voltage V1 of voltage sample module
Corresponding data signal is simultaneously stored to the 3rd register, and wherein very first time node is powered on moment, the second timing node and the
Three timing nodes are two timing nodes in power up, and the interval between the second timing node and very first time node is equal to
Interval between 3rd timing node and the second timing node；Under the 3rd control for enabling signal enc, the first subtracter uses the
The data of one registers storage subtract the data of the second registers storage, and the second subtracter is stored up with the second registers
Data subtract the data of the 3rd registers storage, and the data that the 3rd subtracter again exports the first subtracter subtract the second subtraction
The data of device output, the output signal of the 3rd obtained subtracter is driven by being input to drive module after logic circuit synthesis
Module is by controlling electronic relay module being switched on and off so as to controlled motor.
When electric normal starting on motor, the electric current I for flowing through motor produces a very big peak value, and then is slowly reduced to
Current value during normal work.The electric current that voltage sample module samples flow through motor obtains output voltage V1, what timer was produced
V1 is converted to corresponding data signal in very first time node and is stored in by the first enable signal ena controls analog-digital converter ADC
First register, the second enable signal enb controls analog-digital converter ADC that timer is produced changes V1 in the second timing node
The 3rd enable signal enc control analog-digital converters ADC produced for corresponding data signal and the second register of deposit, timer
V1 is converted into corresponding data signal in the 3rd timing node and the 3rd register is stored in.In the 3rd control for enabling signal enc
Under system, the data that the first subtracter is stored up with the first registers subtract the data of the second registers storage, the second subtracter
The data stored up with the second registers subtract the data that the 3rd registers are stored up, and the 3rd subtracter is defeated by the first subtracter again
The data gone out subtract the data of the second subtracter output, and now the output signal of the first subtracter is significantly greater than the second subtracter
Output signal, therefore output obtains a positive data signal, the overcurrent protection module after logic circuit Logic logic synthesis
Output V2 does not overturn and is always low level, as shown in Figure 2；V2 is the input of drive module, reaches defeated after drive module
It is high level to go out to hold V3, opens electronic relay, motor normal starting.
After motor normal starting, when in running order, the electric current for flowing through motor is I, voltage sample module samples electricity
Stream I obtains a voltage V1；Timer enables control model converter ADC, the first register, the second register, the 3rd deposit
State when device, the first subtracter, the second subtracter and the 3rd subtracter keep starting is defeated after logic circuit Logic synthesis
Go out V2, now V2 is low level；V2 is low level, the output signal V3 after drive module be high level, open electronics after
Electrical equipment, motor runs well.
When stall excessively stream occurs for motor, the electric current I of motor is flowed through all the time in a larger peak value, peak point current is at any time
Between originally have and slightly decrease and then keep constant.The electric current that voltage sample module samples flow through motor obtains output voltage V1,
V1 is converted to corresponding number by the first enable signal ena controls analog-digital converter ADC that timer is produced in very first time node
Word signal is simultaneously stored in the first register, and the second enable signal enb that timer is produced controls analog-digital converter ADC in the second time
V1 is converted to corresponding data signal and is stored in the second register by node, the 3rd enable signal enc controls that timer is produced
V1 is converted to corresponding data signal in the 3rd timing node and is stored in the 3rd register by analog-digital converter ADC.Make the 3rd
Under energy signal enc control, the data that the first subtracter is stored up with the first registers subtract the number of the second registers storage
According to the data that the second subtracter is stored up with the second registers subtract the data of the 3rd registers storage, and the 3rd subtracter is again
By the first subtracter export data subtract the second subtracter output data, now the output signal of the first subtracter close to or
Equal to the output signal of the second subtracter, therefore output obtains the data signal that one is approximately zero, with upper electric normal starting gained
Data signal has greatest differences, and overcurrent protection module output V2 upsets are high electricity after logic circuit Logic logic synthesis
Put down and remain high level until re-powering；V2 is the input of drive module, the output signal V3 after drive module
For low level, electronic relay is turned off, so as to turn off motor.
The beneficial effects of the invention are as follows：A kind of electric machine controller based on multi-point sampling current foldback circuit is provided, can
The high current caused when accurately and effectively distinguishing electricity on motor and during stall excessively stream, in voltage sample module samples to big voltage
When, whether overcurrent protection module identification motor occurs stall, once confirming that stall occurs for motor, electronic relay is turned off in time,
And then turn off motor, protection chip and motor；The method that multi-point sampling is used in overcurrent protection module, it is ensured that the essence of judgement
Degree.
Brief description of the drawings
It is the structural representation for the electric machine controller based on multi-point sampling current foldback circuit that the present invention is provided shown in Fig. 1
Figure；
Fig. 2 is motor working current and sampling module output voltage V1 and overcurrent protection mould in power up in embodiment
The graph of a relation of the signal of each in block；
Fig. 3 is motor rotation blockage electric current and sampling module output voltage V1 and overcurrent protection mould during stall in embodiment
The graph of a relation of the signal of each in block；
Fig. 4 is the structural representation of drive module in embodiment.
Embodiment
With reference to the accompanying drawings and examples, technical scheme is described in detail：
The structural representation of the electric machine controller based on multi-point sampling current foldback circuit provided as shown in Figure 1 for the present invention
Figure, including voltage sample module, overcurrent protection module, drive module, electronic relay module；The output of electronic relay module
End connection motor, its earth terminal connects the input of voltage sample module；The input connection voltage sample of overcurrent protection module
The output end of module, the control end that its output end passes through connection electronic relay module after drive module；Wherein, voltage sample mould
The operating current of block sample motor, overcurrent protection module turns off motor when excessively stream occurs for motor, drive module control electronics after
Electrical equipment is opened and shut off.
Overcurrent protection module includes timer, analog-digital converter, the first register, the second register, the 3rd register, the
One subtracter, the second subtracter, the 3rd subtracter and logic circuit, the input of analog-digital converter are used as current foldback circuit
Input, its output end connects the input of the first register, the second register and the 3rd register；Timer, which produces first, to be made
Can signal ena, the second enable signal enb and the 3rd enable signal enc, first enable signal ena the first registers of input and mould
The Enable Pin of number converter, second enables the Enable Pin that signal enb inputs the second register and analog-digital converter, and the 3rd enables letter
Number enc inputs the Enable Pin of the 3rd register, analog-digital converter, the first subtracter, the second subtracter and the 3rd subtracter；First
The subtracting input of subtracter connects the output end of the first register, and its minuend input connects the output of the second register
End；The subtracting input of second subtracter connects the output end of the second register, and its minuend input connects the 3rd register
Output end；The subtracting input of 3rd subtracter connects the output end of the first subtracter, its minuend input connection second
The output end of subtracter；The input of logic circuit connects the output end of the 3rd subtracter, and its output end is used as overcurrent protection electricity
The output end on road.
Embodiment：
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in the voltage sample module in Fig. 1, the voltage sample module in the present embodiment includes sampling resistor Rs and fortune
Calculate amplifier OPA, operational amplifier OPA negative input is as the input of voltage sample module, and its positive input connects
Ground, its output end as voltage sample module output end, sampling resistor Rs be connected on the voltage sample module input and
Between ground.
Under AC applications, voltage sample module can also be made up of resistive-capacitive voltage divider module or electric capacity series connection division module.
As shown in figure 4, drive module in the present embodiment includes the first phase inverter, the second phase inverter, the 3rd phase inverter, the
Four phase inverters, the first PMOS PM1, the second PMOS PM2, the second NMOS tube NM2, the 3rd NMOS tube NM3 and resistance R1, first
The input of phase inverter connects the output end of overcurrent protection module, the output end connection electronic relay module of the 4th phase inverter
Control end；The input of second phase inverter connects the output end of the first phase inverter and the second NMOS tube NM2 grid, its output end
Connect the 3rd NMOS tube NM3 grid；First PMOS PM1 the second NMOS tube NM2 of drain electrode connection drain electrode and the 2nd PMOS
Pipe PM2 grid, its grid connects the defeated of the second PMOS PM2 drain electrode, the 3rd NMOS tube NM3 drain electrode and the 3rd phase inverter
Enter the source of the source ground at end, the second NMOS tube NM2 and the 3rd NMOS tube NM3, the first PMOS PM1 and the second PMOS PM2
Pole meets the supply voltage VIN of motor；The input of 4th phase inverter connects the output end of the 3rd phase inverter, and resistance R1 is connected on the 4th
Between the output end and ground of phase inverter.The wherein supply voltage VIN of motor is DC voltage, about 12V.
Electronic relay module includes the first NMOS tube NM1 in the present embodiment, and the first NMOS tube NM1 grid is used as electronics
The control end of relay module, its output end drained as electronic relay module, its source electrode is used as electronic relay module
Earth terminal.
Electronic relay module can also be IGBT power models or GTO power models.Wherein IGBT power models include
One IGBT pipe, i.e. insulated gate bipolar transistor, GTO power models include a GTO pipe, i.e. gate turn off thyristor, its
Connected mode is identical with the first NMOS tube NM1.
The operation principle of the present embodiment is：
When electric normal starting on motor, the electric current I for flowing through motor produces a very big peak value, and then is slowly reduced to
Current value during normal work.The electric current that voltage sample module samples flow through motor obtains output voltage V1, what timer was produced
V1 is converted to corresponding data signal in very first time node and is stored in by the first enable signal ena controls analog-digital converter ADC
First register, the second enable signal enb controls analog-digital converter ADC that timer is produced changes V1 in the second timing node
The 3rd enable signal enc control analog-digital converters ADC produced for corresponding data signal and the second register of deposit, timer
V1 is converted into corresponding data signal in the 3rd timing node and the 3rd register is stored in.In the 3rd control for enabling signal enc
Under system, the data that the first subtracter is stored up with the first registers subtract the data of the second registers storage, the second subtracter
The data stored up with the second registers subtract the data that the 3rd registers are stored up, and the 3rd subtracter is defeated by the first subtracter again
The data gone out subtract the data of the second subtracter output, and now the output signal of the first subtracter is significantly greater than the second subtracter
Output signal, therefore output obtains a positive data signal, the overcurrent protection module after logic circuit Logic logic synthesis
Output V2 does not overturn and is always low level, as shown in Figure 2；V2 is the input of drive module, by first in drive module
Phase inverter, second the second NMOS tube of inverter controlling NM2, the second PMOS PM2 conductings, the first PMOS PM1, the 3rd NMOS tube
NM3 is turned off, and it is high level that output end V3 is reached after the 3rd phase inverter, the 4th phase inverter, opens electronic relay, motor is just
Often start.
After motor normal starting, when in running order, the electric current for flowing through motor is I, voltage sample module samples electricity
Stream I obtains a voltage V1；Timer enables control model converter ADC, the first register, the second register, the 3rd deposit
State when device, the first subtracter, the second subtracter and the 3rd subtracter keep starting is defeated after logic circuit Logic synthesis
Go out V2, now V2 is low level；V2 is low level, by the first phase inverter in drive module, the second inverter controlling second
NMOS tube NM2, the second PMOS PM2 are turned on, the first PMOS PM1, the 3rd NMOS tube NM3 shut-off, by the 3rd phase inverter, the
It is high level that output end V3 is reached after four phase inverters, opens electronic relay, motor normal starting.
When stall excessively stream occurs for motor, the electric current I of motor is flowed through all the time in a larger peak value, peak point current is at any time
Between originally have and slightly decrease and then keep constant.The electric current that voltage sample module samples flow through motor obtains output voltage V1,
V1 is converted to corresponding number by the first enable signal ena controls analog-digital converter ADC that timer is produced in very first time node
Word signal is simultaneously stored in the first register, and the second enable signal enb that timer is produced controls analog-digital converter ADC in the second time
V1 is converted to corresponding data signal and is stored in the second register by node, the 3rd enable signal enc controls that timer is produced
V1 is converted to corresponding data signal in the 3rd timing node and is stored in the 3rd register by analog-digital converter ADC.Make the 3rd
Under energy signal enc control, the data that the first subtracter is stored up with the first registers subtract the number of the second registers storage
According to the data that the second subtracter is stored up with the second registers subtract the data of the 3rd registers storage, and the 3rd subtracter is again
By the first subtracter export data subtract the second subtracter output data, now the output signal of the first subtracter close to or
Equal to the output signal of the second subtracter, therefore output obtains the data signal that one is approximately zero, with upper electric normal starting gained
Data signal has greatest differences, and overcurrent protection module output V2 upsets are high electricity after logic circuit Logic logic synthesis
Put down and remain high level until re-powering, as shown in Figure 3；V2 is the input of drive module, by drive module
The first phase inverter, second the second NMOS tube of inverter controlling NM2, the second PMOS PM2 conducting, the first PMOS PM1, the 3rd
NMOS tube NM3 is turned off, and it is high level that output end V3 is reached after the 3rd phase inverter, the 4th phase inverter, opens electronic relay,
Motor normal starting.
Claims (8)
1. based on the electric machine controller of multi-point sampling current foldback circuit, including electronic relay module, voltage sample module, mistake
Protection module and drive module are flowed, the output end connection motor of the electronic relay module, its earth terminal connects the voltage
The input of sampling module；The input of the overcurrent protection module connects the output end of the voltage sample module, and it is exported
End passes through the control end that electronic relay module is connected after drive module；
Characterized in that, the overcurrent protection module includes timer, analog-digital converter, the first register, the second register, the
Three registers, the first subtracter, the second subtracter, the 3rd subtracter and logic circuit, the input of the analog-digital converter are made
For the input of the current foldback circuit, its output end connects the defeated of the first register, the second register and the 3rd register
Enter end；The timer produces first and enables signal (ena), the second enable signal (enb) and the 3rd enable signal (enc), institute
The Enable Pin that the first enable signal (ena) inputs the first register and analog-digital converter is stated, the second enable signal (enb) is defeated
Enter the Enable Pin of the second register and analog-digital converter, the described 3rd, which enables signal (enc), inputs the 3rd register, analog-to-digital conversion
Device, the first subtracter, the Enable Pin of the second subtracter and the 3rd subtracter；The subtracting input connection first of first subtracter is posted
The output end of storage, its minuend input connects the output end of the second register；The subtracting input connection of second subtracter
The output end of second register, its minuend input connects the output end of the 3rd register；The subtrahend input of 3rd subtracter
The output end of the first subtracter of end connection, its minuend input connects the output end of the second subtracter；The input of logic circuit
End connection the 3rd subtracter output end, its output end as the current foldback circuit output end.
2. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that described
Drive module includes the first phase inverter, the second phase inverter, the 3rd phase inverter, the 4th phase inverter, the first PMOS (PM1), second
PMOS (PM2), the second NMOS tube (NM2), the 3rd NMOS tube (NM3) and resistance (R1),
The input of first phase inverter connects the output end of the overcurrent protection module, and the output end connection of the 4th phase inverter is described
The control end of electronic relay module；
The input of second phase inverter connects the output end of the first phase inverter and the grid of the second NMOS tube (NM2), its output end
Connect the grid of the 3rd NMOS tube (NM3)；
The drain electrode of first PMOS (PM1) connects the drain electrode of the second NMOS tube (NM2) and the grid of the second PMOS (PM2), its
Grid connects the drain electrode of the second PMOS (PM2), the drain electrode of the 3rd NMOS tube (NM3) and the input of the 3rd phase inverter, second
The source electrode of the source ground of NMOS tube (NM2) and the 3rd NMOS tube (NM3), the first PMOS (PM1) and the second PMOS (PM2)
Connect the supply voltage (VIN) of motor；
The input of 4th phase inverter connects the output end of the 3rd phase inverter, resistance (R1) be connected on the 4th phase inverter output end and
Between ground.
3. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that described
Electronic relay module includes the first NMOS tube (NM1), and the grid of the first NMOS tube (NM1) is used as the electronic relay module
Control end, its output end drained as the electronic relay module, its source electrode is used as the electronic relay module
Earth terminal.
4. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that described
Electronic relay module is IGBT power models.
5. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that described
Electronic relay module is GTO power models.
6. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that described
Voltage sample module includes sampling resistor (Rs) and operational amplifier (OPA), the negative input conduct of operational amplifier (OPA)
The input of the voltage sample module, its positive input ground connection, its output end as the voltage sample module output
End, sampling resistor (Rs) is connected between the input of the voltage sample module and ground.
7. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that handing over
Under stream application, the voltage sample module is by resistive-capacitive voltage divider module composition.
8. the electric machine controller according to claim 1 based on multi-point sampling current foldback circuit, it is characterised in that handing over
Under stream application, the voltage sample module is made up of electric capacity series connection division module.
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| CN201710427836.3A CN107069666B (en) | 2017-06-08 | 2017-06-08 | Electric machine controller based on multi-point sampling current foldback circuit |
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| CN201710427836.3A CN107069666B (en) | 2017-06-08 | 2017-06-08 | Electric machine controller based on multi-point sampling current foldback circuit |
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| CN107069666B CN107069666B (en) | 2018-09-18 |
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| US5666066A (en) * | 1994-11-29 | 1997-09-09 | Samsung Electronics Co., Ltd. | Overcurrent detecting device for a DC motor |
| CN101383501A (en) * | 2007-09-03 | 2009-03-11 | 大银微***股份有限公司 | DC motor overload current control circuit |
| CN203251078U (en) * | 2013-04-10 | 2013-10-23 | 深圳市寿百瑞机械科技有限公司 | Motor overcurrent protection circuit and motor driving device |
| CN103457243A (en) * | 2013-09-02 | 2013-12-18 | 深圳市大族激光科技股份有限公司 | Direct current motor protection circuit |
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| CN107069666B (en) | 2018-09-18 |
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