CN207853746U - The direct current output low-frequency ripple compensation circuit of digital charge machine - Google Patents
The direct current output low-frequency ripple compensation circuit of digital charge machine Download PDFInfo
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- CN207853746U CN207853746U CN201820283466.0U CN201820283466U CN207853746U CN 207853746 U CN207853746 U CN 207853746U CN 201820283466 U CN201820283466 U CN 201820283466U CN 207853746 U CN207853746 U CN 207853746U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of direct current output low-frequency ripple compensation circuits of digital charge machine, a kind of processing by the existing analog signal of charger is provided, by the control- action compensation of calculating in output controlled quentity controlled variable, to achieve the purpose that inhibit ripple, cost and volume are not only saved, the ripple compensation circuit of properties of product and service life is also improved.Including AC power, main power circuit, control circuit, power battery and bus communication circuit；The AC power is used for providing power supply to main power circuit, and the main power circuit is used to convert AC power to DC power supply by rectification, and the DC power supply after the conversion charges to power electric battery；The output specification of the DC power supply is by control circuit control；The control circuit is for controlling main power circuit；The control circuit is communicated by bus communication circuit and external control unit outside.
Description
Technical field
The utility model is related to a kind of compensation of the direct current output low-frequency ripple of digital charge machine more particularly to digital charge machine
Circuit.
Background technology
The power grade of current Vehicular charger is typically all 3.3kW or 6.6kW, in the mainstream circuit of this power grade
Topology all uses switching power circuit topological (for example prime PFC adds rear class LLC).Due to the system required by power factor (PFC)
About, the low-frequency ripple of 2 times of power frequencies (100Hz/120Hz) is certainly existed in the DC bus side of prime pfc circuit output.This
If low-frequency ripple is not pocessed, will be embodied in final direct current output by the transformation of rear class DC-DC.As vehicle-mounted
The output of charger will produce the fluctuation of larger current or voltage if low-frequency ripple is larger.This will be to BMS's first
Work has an impact, serious to charge normal.Secondly, accumulator is filled with the direct current of larger low-frequency ripple component
Electricity can reduce the service life of accumulator.
For that purpose it is necessary to inhibit to the low-frequency ripple of charger output.Inhibit charger output end low-frequency ripple, way
There are two types of diameters：It either reduces the low-frequency ripple of prime PFC output bus bar sides or the ripple is controlled in rear class, inhibit
Its component in rear class direct current output.The former corresponding conventional method is the large capacity directly in parallel on PFC output DC bus
Electrolytic capacitor, accumulator or access active filter.Although effectively inhibiting low-frequency ripple electric current, large capacity in this way
Electrolytic capacitor and active filter can not only increase system cost and increase small product size, but also largely use electrolytic capacitor
It can influence the service life of product.It is practical thus often to use latter approach, it is exactly by late-class circuit control algolithm
Closed-loop control is done for low-frequency ripple, by reducing control bandwidth, to achieve the effect that inhibit low-frequency ripple.Although this method
Also it can work, but the dynamic response of rear class DC-DC converter can be poor, when loading mutation, at least need several
It could stablize after power frequency period, this is a very high risk point for the reliability of product.
Utility model content
The main purpose of the utility model is to provide a kind of processing by the existing analog signal of charger, will calculate
Control- action compensation output controlled quentity controlled variable on, to achieve the purpose that inhibit ripple, not only save cost and volume, also promoted
Properties of product and service life.
To achieve the goals above, the technical solution of the utility model is as follows：
A kind of direct current output low-frequency ripple compensation circuit of digital charge machine, including AC power, main power circuit, control
Circuit, power battery and bus communication circuit；The AC power is used for providing power supply, the main work(to main power circuit
Rate circuit is used to convert AC power to DC power supply by rectification, and the DC power supply after the conversion fills power electric battery
Electricity；The output specification of the DC power supply is by control circuit control；The control circuit is for controlling main power circuit
System；The control circuit is communicated by bus communication circuit and external control unit outside.
The control circuit is used to carry out control to main power circuit to include analog quantity sampling, driving circuit control and temperature
Degree detection control.
The main power circuit includes AC-DC converter, the friendship which is used to input main power circuit
Galvanic electricity source is converted to DC power supply；Filter circuit, the filter circuit is for transformed DC power supply to be filtered；DC-DC
DC converting circuit, the DC-DC DC converting circuits are used for the voltage and current of control output circuit, by the filtered electrical
The DC power supply of DC-DC DC converting circuits is input to power battery charging after the filtering of road.
The control circuit includes sampling and driving circuit, and the sampling and driving circuit are used for the voltage to output circuit
Current sample and driving, phase lock circuitry, the phase lock circuitry are used to examine the frequency and phase of the alternating voltage of input circuit
It surveys；Exchange side microcontroller, the exchange side microcontroller are used to convert the analog signal that sample circuit inputs to digital signal；Direct current
Side microcontroller, the pulse-width signal which is used to input phase lock circuitry obtain the phase of AC power with
Frequency, and then the frequency and phase of 2 times of working frequency ripple waves on output DC voltage are obtained, the DC side microcontroller is by the pulsewidth
Modulated signal is combined with output loading characteristic corresponding obtained coefficient of tabling look-up, and obtains the compensation rate inhibited to output ripple；Also
Including another sampling and driving circuit, the sampling and driving circuit for being transmitted to DC side list to the AC signal of input
Piece；The DC side microcontroller passes through the communications between bus communication circuit and peripheral control unit.
The phase lock circuitry includes Zero-cross comparator circuit, capture phase lock circuitry and pulse-width signal capture circuit；Institute
The Zero-cross comparator circuit stated is used to convert analog signal to digital signal；The capture phase lock circuitry is for Zero-cross comparator electricity
Road direct current signal capture locking, improves the stability of DC power supply；The Zero-cross comparator circuit is for converting analog signal
For digital signal；The pulse-width signal capture circuit does chronoscope for the period of pulse-width signal and duty ratio
It calculates, obtains digital signal；The direct current signal for being input to Zero-cross comparator circuit is input to by pulse-width signal circuit
DC side microcontroller；The sample circuit is converted into direct current after sampling the AC signal of input by exchange side microcontroller to be believed
Number, input direct-current side microcontroller after being filtered using filter circuit；The DC side microcontroller is defeated by the direct current signal of input
Enter to driving switch circuit.
The DC side microcontroller includes ripple frequency phase circuit, frequency and phase for calculating output ripple electric current
Position；Compensation factor circuit is compensated factor for tabling look-up；Ripple compensation amount circuit, the compensation rate for obtaining ripple current；
Closed control circuit is for obtaining closed-loop control amount；The Zero-cross comparator circuit by direct current signal by capture phase lock circuitry and
Pulse-width signal circuit is input to ripple frequency phase circuit, which passes through the direct current signal of acquisition
Ripple compensation amount circuit and output control circuit are transmitted to output switch driving circuit；The sample circuit is by the exchange of input
Signal is converted into after direct current signal by exchange side microcontroller and is filtered by filter circuit, all the way by direct current signal by compensation because
Number circuit and ripple compensation amount circuit are input to output control circuit；Another way inputs direct current signal by closed control circuit
To output control circuit.
The filter circuit is dc-link capacitance, storage and voltage letter of the dc-link capacitance for circuit energy
Number filtering.
The utility model has the beneficial effects that：1), the utility model can be due to that can obtain output low frequency ripple compensation
Amount, then subtracts the compensation rate in DC-DC Closed Loop Control Unit output quantities, can to limited current state output voltage low-frequency ripple
Effectively inhibited；2), the utility model is due to without increasing big DC side filter capacitor or sacrificing rear class converter
Loops control bandwidth, so the utility model can make the miniaturization of Vehicular charger；3) product cost, is reduced, and is carried
The high Performance And Reliability of compensation circuit system.
Description of the drawings
Fig. 1 is the utility model embodiment ripple compensation control circuit block diagram；
Fig. 2 is the utility model embodiment charging phase lock circuitry block diagram；
Fig. 3 is the utility model embodiment DC side SCM system block diagram.
Specific implementation mode
Below in conjunction with the accompanying drawings and the embodiments of the present invention are described in further detail utility model.
The utility model need not increase hardware cost and volume, need not also sacrifice rear class loop control response bandwidth
Under conditions of, realize effective inhibition to output low frequency ripple.This control mode is in rear class DC-DC by handing over input
Galvanic electricity presses locking phase, obtains the sinusoidal quantity of 2 times of power frequencies and same-phase.Simultaneously according to output voltage, output current and ripple amplitude are quasi-
The three-dimensional matrice closed out is tabled look-up, and a compensation factor is obtained.Compensation factor sinusoidal quantity corresponding with input voltage is multiplied again, is obtained
To one and the compensation rate of output current ripple same-phase.The compensation rate finally is subtracted in normal closed-loop control output quantity,
To have the function that open loop inhibits output current ripple.
Referring to Fig. 1, a kind of direct current output low-frequency ripple compensation circuit of digital charge machine, including AC power 1, main power
Electricity, 3, control circuit 4, power battery 5 and bus communication circuit 6；The AC power 1 is used for providing electricity to main power circuit
Source, the main power circuit 3 are used to convert AC power to DC power supply by rectification, the DC power supply pair after the conversion
Power electric battery charging 5；The output specification of the DC power supply 2 is by control circuit control；The control circuit 4 is used for master
Power circuit 3 is controlled；The control circuit 4 is communicated by bus communication circuit 6 with external control unit outside.
The control circuit 4 be used for main power circuit 3 carry out control include analog quantity sampling, driving circuit control and
Temperature detection controls.
Referring to Fig. 1, the main power circuit includes AC-DC converter 31, which is used for main work(
The AC power 1 that rate circuit 3 inputs is converted to DC power supply；Filter circuit 32, which is used for will be transformed straight
Galvanic electricity source is filtered.The filter circuit can be dc-link capacitance, and the dc-link capacitance is for circuit energy
The filtering of storage and voltage signal.
DC-DC DC converting circuits 33, voltage electricity of the DC-DC DC converting circuits for control output circuit
Stream is input to DC power supply that DC-DC circuit 33 is converted to power battery charging after filtering the filter circuit 32.
Referring to Fig. 1, the control circuit 4 includes sampling and driving circuit 41, the sampling and driving circuit 41 for pair
The voltage and current of output circuit samples and driving, phase lock circuitry 42, which is used for the alternating voltage of input circuit
Frequency and phase are detected；Exchange side microcontroller 44, the simulation which is used to input sample circuit 41
Signal is converted into digital signal；DC side microcontroller 45, the pulsewidth tune which is used to input phase lock circuitry
Signal processed obtains the phase and frequency of AC power, and then obtains the frequency and phase of 2 times of working frequency ripple waves on output DC voltage,
The pulse-width signal is combined by the DC side microcontroller 45 with output loading characteristic corresponding obtained coefficient of tabling look-up, and is obtained
To the compensation rate inhibited to output ripple；Further include that another sampling and driving circuit 43, the sampling and driving circuit 43 are used for
DC side microcontroller 45 is transmitted to the AC signal of input；The DC side microcontroller 45 by bus communication circuit 6 with
Communications between peripheral control unit.
Referring to Fig. 2, the phase lock circuitry 42 includes Zero-cross comparator circuit 421, capture phase lock circuitry 422 and pulsewidth tune
Signal circuit (PWM) 423 processed；The Zero-cross comparator circuit 421 is used to convert analog signal to digital signal；Described catches
It obtains phase lock circuitry 422 to lock for Zero-cross comparator circuit direct signal capture, improves the stability of DC power supply；The pulsewidth
Modulated signal (PWM) 423 does timing calculating for the period of pulse-width signal and duty ratio, obtains digital signal；Described
The direct current signal for being input to Zero-cross comparator circuit 421 is input to DC side microcontroller 45 by pulse-width signal (PWM) 423；
The sample circuit 41 will be converted into direct current signal after the AC signal sampling of input by exchange side microcontroller 44, then pass through
Cross input direct-current side microcontroller 45 after filter circuit 432 filters；The DC side microcontroller 45 is defeated by the direct current signal of input
Enter to driving switch circuit 46.
Referring to Fig. 3, the DC side microcontroller 451 includes ripple frequency phase circuit, for calculating output ripple electricity
The frequency and phase of stream；Compensation factor circuit 452 is compensated factor for tabling look-up；Ripple compensation amount circuit 453, for
To the compensation rate of ripple current；Closed control circuit 454 is for obtaining closed-loop control amount；The Zero-cross comparator circuit 421 will
Direct current signal is input to ripple frequency phase circuit 451 by capturing phase lock circuitry 422 and pulse-width signal circuit 423, should
Ripple frequency phase circuit 451 passes the direct current signal of acquisition by ripple compensation amount circuit 453 and output control circuit 455
Transport to output switch driving circuit 456；The AC signal of input is passed through 44 turns of exchange side microcontroller by the sample circuit 431
It is filtered by filter circuit 432 after turning to direct current signal, direct current signal is passed through benefit by the filtered direct current signal all the way
It repays factor circuit 452 and ripple compensation amount circuit 453 is input to output control circuit 455；Another way is by direct current signal by closing
Loop control circuit 454 is input to output control circuit 455.
The above, the only preferred embodiment of the utility model, are not intended to limit the protection of the utility model
Range.
Claims (7)
1. a kind of direct current output low-frequency ripple compensation circuit of digital charge machine, it is characterised in that：Including AC power, main power
Circuit, control circuit, power battery and bus communication circuit；The AC power is used for providing power supply to main power circuit,
The main power circuit is used to convert AC power to DC power supply by rectification, and the DC power supply after the conversion is to power
Battery charges；The output specification of the DC power supply is by control circuit control；The control circuit is used for main power circuit
It is controlled；The control circuit is communicated by bus communication circuit and external control unit outside.
2. the direct current output low-frequency ripple compensation circuit of digital charge machine according to claim 1, it is characterised in that：Described
Control circuit is used to carry out control to main power circuit to include that analog quantity sampling, driving circuit control and temperature detection control.
3. the direct current output low-frequency ripple compensation circuit of digital charge machine according to claim 1 or claim 2, it is characterised in that：Institute
The main power circuit stated includes AC-DC converter, which is used to convert the AC power that main power circuit inputs
For DC power supply；Filter circuit, the filter circuit is for transformed DC power supply to be filtered；DC-DC direct currents conversion electricity
Road, the DC-DC DC converting circuits are used for the voltage and current of control output circuit, defeated after the filter circuit is filtered
Enter the DC power supply to DC-DC DC converting circuits to power battery charging.
4. the direct current output low-frequency ripple compensation circuit of digital charge machine according to claim 1 or claim 2, it is characterised in that：Institute
The control circuit stated includes sampling and driving circuit, the sampling and driving circuit be used for voltage and current sampling to output circuit and
Driving, phase lock circuitry, the phase lock circuitry are used to be detected the frequency and phase of the alternating voltage of input circuit；Exchange side list
Piece machine, the exchange side microcontroller are used to convert the analog signal that sample circuit inputs to digital signal；DC side microcontroller, should
The pulse-width signal that direct current unilateral side microcontroller is used to input phase lock circuitry obtains the phase and frequency of AC power, and then obtains
To output DC voltage on 2 times of working frequency ripple waves frequency and phase, the DC side microcontroller by the pulse-width signal with
Output loading characteristic corresponding obtained coefficient of tabling look-up is combined, and obtains the compensation rate inhibited to output ripple；Further include another
Sampling and driving circuit, the sampling and driving circuit to the AC signal of input for being transmitted to DC side microcontroller；Described
DC side microcontroller passes through the communications between bus communication circuit and peripheral control unit.
5. the direct current output low-frequency ripple compensation circuit of digital charge machine according to claim 4, it is characterised in that：Described
Phase lock circuitry includes Zero-cross comparator circuit, capture phase lock circuitry and pulse-width signal circuit；The Zero-cross comparator circuit is used
In converting analog signal to digital signal；The capture phase lock circuitry is locked for Zero-cross comparator circuit direct signal capture
It is fixed, improve the stability of DC power supply；The Zero-cross comparator circuit is used to convert analog signal to digital signal；Described
Pulse-width signal circuit does timing calculating for the period of pulse-width signal and duty ratio, obtains digital signal；Described
The direct current signal for being input to Zero-cross comparator circuit is input to DC side microcontroller by pulse-width signal capture circuit；Described
Sample circuit will be converted into direct current signal after the AC signal sampling of input by exchange side microcontroller, be filtered using filter circuit
Input direct-current side microcontroller after wave；The direct current signal of input is input to driving switch circuit by the DC side microcontroller.
6. the direct current output low-frequency ripple compensation circuit of digital charge machine according to claim 5, it is characterised in that：Described
DC side microcontroller includes ripple frequency phase circuit, frequency and phase for calculating output ripple electric current；Compensation factor electricity
Road is compensated factor for tabling look-up；Ripple compensation amount circuit, the compensation rate for obtaining ripple current；Closed control circuit
For obtaining closed-loop control amount；The Zero-cross comparator circuit is by direct current signal by capturing phase lock circuitry and pulse-width signal
Circuit is input to ripple frequency phase circuit, which passes through ripple compensation amount electricity by the direct current signal of acquisition
Road and output control circuit are transmitted to output switch driving circuit；The AC signal of input is passed through exchange by the sample circuit
Side microcontroller is filtered after being converted into direct current signal by filter circuit, and direct current signal is passed through compensation factor circuit and ripple all the way
Compensation rate circuit is input to output control circuit；Direct current signal is input to output control electricity by another way by closed control circuit
Road.
7. the direct current output low-frequency ripple compensation circuit of digital charge machine according to claim 3, it is characterised in that：Described
Filter circuit is dc-link capacitance, filtering of the dc-link capacitance for the storage and voltage signal of circuit energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820283466.0U CN207853746U (en) | 2018-02-28 | 2018-02-28 | The direct current output low-frequency ripple compensation circuit of digital charge machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820283466.0U CN207853746U (en) | 2018-02-28 | 2018-02-28 | The direct current output low-frequency ripple compensation circuit of digital charge machine |
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| Publication Number | Publication Date |
|---|---|
| CN207853746U true CN207853746U (en) | 2018-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820283466.0U Expired - Fee Related CN207853746U (en) | 2018-02-28 | 2018-02-28 | The direct current output low-frequency ripple compensation circuit of digital charge machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270347A (en) * | 2018-02-28 | 2018-07-10 | 深圳市鼎硕同邦科技有限公司 | The direct current output low-frequency ripple compensation circuit and its control method of digital charge machine |
| CN117728549A (en) * | 2024-02-08 | 2024-03-19 | 北京力源兴达科技有限公司 | Efficient ripple eliminating stable output system and device of power adapter |
-
2018
- 2018-02-28 CN CN201820283466.0U patent/CN207853746U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270347A (en) * | 2018-02-28 | 2018-07-10 | 深圳市鼎硕同邦科技有限公司 | The direct current output low-frequency ripple compensation circuit and its control method of digital charge machine |
| CN108270347B (en) * | 2018-02-28 | 2024-03-05 | 深圳市鼎硕同邦科技有限公司 | DC output low-frequency ripple compensation circuit of digital charger and control method thereof |
| CN117728549A (en) * | 2024-02-08 | 2024-03-19 | 北京力源兴达科技有限公司 | Efficient ripple eliminating stable output system and device of power adapter |
| CN117728549B (en) * | 2024-02-08 | 2024-04-16 | 北京力源兴达科技有限公司 | Efficient ripple eliminating stable output system and device of power adapter |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180911 Termination date: 20200228 |