CN102594129A - Charging control method for direct-current bus capacitor of frequency converter and realizing circuit charging control method - Google Patents
Charging control method for direct-current bus capacitor of frequency converter and realizing circuit charging control method Download PDFInfo
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- CN102594129A CN102594129A CN201110002935XA CN201110002935A CN102594129A CN 102594129 A CN102594129 A CN 102594129A CN 201110002935X A CN201110002935X A CN 201110002935XA CN 201110002935 A CN201110002935 A CN 201110002935A CN 102594129 A CN102594129 A CN 102594129A
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Abstract
The invention discloses a charging control method for a direct-current bus capacitor of a frequency converter and a realizing circuit of the charging control method. The method is realized as follows: when the frequency converter is electrified, the direct-current bus capacitor E1 is charged by a current-limiting resistor R1, after the frequency converter is electrified, electricity is taken from an auxiliary power supply in the frequency converter to control a drive circuit to work, and the drive circuit drives a relay, a normally open contact of the relay is connected at the two ends of the current limiting resistor R1 in parallel, and the current-limiting resistor R1 is enabled to be in short circuit by the normally open contact of the relay. The circuit comprises a power input interface VD connected with the output end of the auxiliary power supply in the frequency converter, a delay starting switch, a driving module and a relay, wherein the power input interface VD inputs the power to the driving module through the delay starting switch, and the delay starting switch controls the on and off of the driving module, the driving module drives the relay to work, and the normally open contact of the relay is connected at two ends of the current-limiting resistor R1 on a bus of the frequency converter in parallel. In the invention, a CPU (Central Processing Unit) does not need to be used for control, so that the burden of the CPU is alleviated, and the simultaneously, the improvement of the reliability of the circuit is facilitated.
Description
Technical field
The present invention discloses a kind of frequency converter, particularly a kind of charge control method of frequency changer direct current bus electric capacity and realization circuit thereof.
Background technology
Frequency converter is a power supply apparatus commonly used in the prior art; During the power supply input; Normally to electric main be carried out rectifying and wave-filtering; Please referring to accompanying drawing 1, after normally elder generation passed through rectifier bridge M1 rectification with electric main during the civil power input, level is common thereafter needed a big electrochemical capacitor E1 to carry out energy storage filtering.Like this; At the frequency converter powered on moment; The voltage of electrochemical capacitor E1 is zero, and this moment, electrochemical capacitor E1 was equivalent to short circuit, if directly behind rectifier bridge M1 level connect electrochemical capacitor E1; Power on the instantaneous temporary impact electric current that flows through rectifier bridge M1 will be very big, damage even directly burn rectifier bridge M1 easily.For the solution of the problems referred to above normally between rectifier bridge M1 and electrochemical capacitor E1 current-limiting resistance R1 of series connection (or be called buffer resistance; Its resistance and power according to DC bus-bar voltage and capacitance size and decide); Like this, just can not cause excessive shock at powered on moment to rectifier bridge M1.After electrochemical capacitor E1 charging is accomplished, need current-limiting resistance R1 short circuit like this, can be reduced the power consumption of current-limiting resistance R1.Mode commonly used at present is exactly to adopt the normally opened contact of relay R Y1; Work as powered on moment; The normally opened contact of relay R Y1 is an off-state, through current-limiting resistance R1 electrochemical capacitor E1 is charged, after the voltage of electrochemical capacitor E1 rises to certain value; Relay R Y1 adhesive, the normally opened contact that utilizes relay R Y1 is with current-limiting resistance R1 short circuit.Please referring to accompanying drawing 2; Conventional control method such as Fig. 2 of relay R Y1; It sends out a level signal to isolating optocoupler through output I/O mouth after detecting busbar voltage by CPU, through optocoupler control triode Q1 conducting, thus control relay RY1 adhesive; But this kind control method will take the port of a CPU, and increases the burden of CPU.
Summary of the invention
When controlling to relay parallelly connected in the above-mentioned frequency converter of mentioning of the prior art with the bus current-limiting resistance; Need take the shortcoming of the I/O mouth of CPU, the present invention provides a kind of charge control method of new frequency changer direct current bus electric capacity and realizes circuit, and it utilizes the accessory power supply of frequency converter to supply power to control relay circuit; When the voltage output of accessory power supply reaches certain value; Think that then the charging of electrochemical capacitor E1 accomplishes the adhesive of control circuit control relay, short circuit current-limiting resistance.
The technical scheme that the present invention solves its technical problem employing is: a kind of charge control method of frequency changer direct current bus electric capacity; This method is a frequency converter when powering on, and gives dc-link capacitance E1 charging through current-limiting resistance R1, after frequency converter powers on; Accessory power supply power taking control Driver Circuit in frequency converter is worked; Driving circuit drives relay, the normally opened contact of relay are connected in parallel on current-limiting resistance R1 two ends, and the normally opened contact that utilizes relay is with current-limiting resistance R1 short circuit.
A kind of circuit of realizing the charge control method of above-mentioned frequency changer direct current bus electric capacity; This circuit comprises power input interface VD, delayed startup switch, driver module and the relay that is connected the auxiliary power output end in the frequency converter; Power input interface VD input power supply is given driver module through the delayed startup switch; Delayed startup switch control and driving module break-make, driver module drives relay work, and the normally opened contact of relay is connected in parallel on the current-limiting resistance R1 two ends on the frequency converter bus.
The technical scheme that the present invention solves its technical problem employing further comprises:
Be provided with latching circuit in the described drive circuit, after the normally opened contact adhesive of relay, latching circuit is kept the normally opened contact adhesive of relay.
Described delayed startup switch adopts and is connected in series in voltage stabilizing didoe Z1 and the filter capacitor C1 between power input interface VD and the ground.
Described driver module adopts triode Q2, and the base stage of triode Q2 is connected the common port of voltage stabilizing didoe Z1 and filter capacitor C1, the grounded emitter of triode Q2, and the collector electrode of triode Q2 is connected with the drive coil of relay.
Also include latching circuit in the described circuit, the break-make of described latching circuit control triode Q2.
Described latching circuit adopts triode Q1; The base stage of triode Q1 is connected on the collector electrode of triode Q2; The emitter of triode Q1 is connected on the power input interface VD; The collector electrode of triode Q1 is connected with the negative pole of voltage stabilizing didoe Z3, and the positive pole of voltage stabilizing didoe Z3 is connected the common port place of voltage stabilizing didoe Z1 and filter capacitor C1.
Be parallel with diode D1 on the drive coil of described relay, the negative pole of diode D1 is connected on the power input interface VD.
The invention has the beneficial effects as follows: the present invention controls without CPU, thereby has alleviated the burden of CPU, simultaneously; The present invention need not introduce other holding wires except that power supply and ground; Be difficult for forming and disturb, the pcb board wiring is simple, does not also have heater element; Help improving circuit efficiency, help improving the reliability of circuit simultaneously.
To combine accompanying drawing and embodiment that the present invention is further specified below.
Description of drawings
Fig. 1 is conventional frequency converter input interface circuit schematic diagram.
Fig. 2 is a prior art repeat circuit control circuit schematic diagram.
Fig. 3 is a control relay circuit schematic diagram of the present invention.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection range of the present invention.
The present invention is a kind of bootstrapping control mode of relay; Owing to all include an accessory power supply in the frequency converter; Accessory power supply generally all utilizes dc bus to supply power, and main method of the present invention is given dc-link capacitance E1 charging for when frequency converter powers on through current-limiting resistance R1; After frequency converter powers on and acquires a certain degree (voltage that is electrochemical capacitor E1 reaches certain value); Accessory power supply in the frequency converter begins to work on power, and the accessory power supply power taking control Driver Circuit in frequency converter is worked, the work of driving circuit drives relay; The normally opened contact of relay is connected in parallel on current-limiting resistance R1 two ends, and the normally opened contact that utilizes relay is with current-limiting resistance R1 short circuit.Also be provided with latching circuit in the present embodiment, after the normally opened contact adhesive of relay, latching circuit is kept the normally opened contact adhesive of relay
Please referring to accompanying drawing 3; Circuit among the present invention comprises power input interface VD, delayed startup switch, driver module and the relay that is connected the auxiliary power output end in the frequency converter; Power input interface VD input power supply is given driver module through the delayed startup switch; Delayed startup switch control and driving module break-make, in the present embodiment, the delayed startup switch adopts and is connected in series in voltage stabilizing didoe Z1 and the filter capacitor C1 between power input interface VD and the ground; Driver module adopts triode Q2; The base stage of triode Q2 is connected the common port of voltage stabilizing didoe Z1 and filter capacitor C1, the grounded emitter of triode Q2, and the collector electrode of triode Q2 is connected with the drive coil of relay.In the present embodiment; Also include latching circuit in the circuit; Latching circuit adopts triode Q1, and the base stage of triode Q1 is connected on the collector electrode of triode Q2, and the emitter of triode Q1 is connected on the power input interface VD; The collector electrode of triode Q1 is connected with the negative pole of voltage stabilizing didoe Z3, and the positive pole of voltage stabilizing didoe Z3 is connected the common port place of voltage stabilizing didoe Z1 and filter capacitor C1.Driver module drives relay work, and the normally opened contact of relay is connected in parallel on the current-limiting resistance R1 two ends on the frequency converter bus.Be parallel with diode D1 on the drive coil of relay, the negative pole of diode D1 is connected on the power input interface VD.
The present invention cooperates as the use of the input interface circuit among Fig. 1 in use, has only voltage as the electrochemical capacitor E1 in the dc bus to be cushioned after resistance R 1 is charged to certain value after frequency converter powers on; Accessory power supply just can start, thereby sets up the magnitude of voltage of VD, in case the voltage of VD surpasses the puncture voltage of voltage stabilizing didoe Z1; Voltage stabilizing didoe Z1 will conducting, gives filter capacitor C1 charging then, after the voltage of filter capacitor C1 reaches the conducting voltage of triode Q2; Drive triode Q2 conducting, make relay R Y1 adhesive, after the relay R Y1 adhesive; Its normally opened contact is with buffer resistance R1 short circuit; Normally opened contact through relay is directly given DC bus powered, and this circuit makes triode Q2 continue conducting through triode Q1 conducting, thus the formation exclusive circuit; Simultaneously switch voltage stabilizing didoe Z1, protection voltage stabilizing didoe Z1 is not damaged.
When system's power down, voltage VD reduces, when the voltage of VD drops to the conducting voltage sum of the puncture voltage that is lower than voltage stabilizing didoe Z3 and triode Q2; Voltage stabilizing didoe Z3 can't conducting; Exclusive circuit lost efficacy, and triode Q2 recovers to turn-off, and relay R Y1 is broken off.In the present embodiment, the voltage stabilizing didoe Z1 of employing adjustment adhesive initial voltage, its conducting voltage must be less than VD; Voltage stabilizing didoe Z3 adjustment relay R Y1 release voltage; The voltage stabilizing value of voltage stabilizing didoe Z3 must be less than voltage stabilizing didoe Z1, and the size of height that the choosing of the voltage stabilizing value of voltage stabilizing didoe Z3 and the voltage stabilizing value of voltage stabilizing didoe Z1 depended on voltage VD and the coil voltage of relay R Y1 is in the present embodiment; Voltage VD is chosen for 18V; It is the relay of 18V that relay R Y1 adopts coil voltage, and the voltage stabilizing value of voltage stabilizing didoe Z1 is 15V, and the voltage stabilizing value of voltage stabilizing didoe Z 3 is 6.2V.
The present invention controls without CPU, thereby has alleviated the burden of CPU, simultaneously; The present invention need not introduce other holding wires except that power supply and ground, be difficult for forming disturbing, and the pcb board wiring is simple; Do not have heater element yet, help improving circuit efficiency, help improving the reliability of circuit simultaneously.
Claims (8)
1. the charge control method of a frequency changer direct current bus electric capacity; It is characterized in that: described method is a frequency converter when powering on, and gives dc-link capacitance E1 charging through current-limiting resistance R1, after frequency converter powers on; Accessory power supply power taking control Driver Circuit in frequency converter is worked; Driving circuit drives relay, the normally opened contact of relay are connected in parallel on current-limiting resistance R1 two ends, and the normally opened contact that utilizes relay is with current-limiting resistance R1 short circuit.
2. the charge control method of frequency changer direct current bus electric capacity according to claim 1 is characterized in that: be provided with latching circuit in the described drive circuit, after the normally opened contact adhesive of relay, latching circuit is kept the normally opened contact adhesive of relay.
3. the circuit of the charge control method of realization frequency changer direct current bus electric capacity according to claim 1 or claim 2; It is characterized in that: described circuit comprises power input interface VD, delayed startup switch, driver module and the relay that is connected the auxiliary power output end in the frequency converter; Power input interface VD input power supply is given driver module through the delayed startup switch; Delayed startup switch control and driving module break-make; Driver module drives relay work, and the normally opened contact of relay is connected in parallel on the current-limiting resistance R1 two ends on the frequency converter bus.
4. circuit according to claim 3 is characterized in that: described delayed startup switch adopts and is connected in series in voltage stabilizing didoe Z1 and the filter capacitor C1 between power input interface VD and the ground.
5. circuit according to claim 4; It is characterized in that: described driver module adopts triode Q2; The base stage of triode Q2 is connected the common port of voltage stabilizing didoe Z1 and filter capacitor C1, the grounded emitter of triode Q2, and the collector electrode of triode Q2 is connected with the drive coil of relay.
6. circuit according to claim 5 is characterized in that: also include latching circuit in the described circuit, the break-make of described latching circuit control triode Q2.
7. circuit according to claim 6; It is characterized in that: described latching circuit adopts triode Q1; The base stage of triode Q1 is connected on the collector electrode of triode Q2; The emitter of triode Q1 is connected on the power input interface VD, and the collector electrode of triode Q1 is connected with the negative pole of voltage stabilizing didoe Z3, and the positive pole of voltage stabilizing didoe Z3 is connected the common port place of voltage stabilizing didoe Z1 and filter capacitor C1.
8. according to any described circuit in the claim 3 to 6, it is characterized in that: be parallel with diode D1 on the drive coil of described relay, the negative pole of diode D1 is connected on the power input interface VD.
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| CN201110002935.XA CN102594129B (en) | 2011-01-08 | 2011-01-08 | A kind of charge control method of DC bus capacitor of frequency converter and realizing circuit thereof |
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| CN201110002935.XA CN102594129B (en) | 2011-01-08 | 2011-01-08 | A kind of charge control method of DC bus capacitor of frequency converter and realizing circuit thereof |
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| CN102594129A true CN102594129A (en) | 2012-07-18 |
| CN102594129B CN102594129B (en) | 2015-10-14 |
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| CN103427618A (en) * | 2013-06-24 | 2013-12-04 | 深圳市英威腾电气股份有限公司 | Soft start control circuit |
| CN106452402A (en) * | 2015-08-04 | 2017-02-22 | 厦门雅迅网络股份有限公司 | Method for opening and closing device power supply through button |
| CN106787867A (en) * | 2016-11-30 | 2017-05-31 | 上海航天控制技术研究所 | A kind of rate gyroscope power supply |
| CN106940400A (en) * | 2017-05-05 | 2017-07-11 | 深圳市诺尔安磁检测科技有限公司 | Phase angle on-off controller and its application method |
| CN107196493A (en) * | 2017-04-07 | 2017-09-22 | 深圳力工新能源科技有限公司 | The anti-input dash current circuit of automobile power source |
| CN108269714A (en) * | 2017-12-12 | 2018-07-10 | 上海海得控制***股份有限公司 | Relay crowbar circuit and control device |
| CN109342935A (en) * | 2018-10-08 | 2019-02-15 | 珠海格力电器股份有限公司 | Device and method for detecting failure of direct-current bus charging circuit relay and motor |
| CN110233578A (en) * | 2019-06-04 | 2019-09-13 | 浙江正泰电器股份有限公司 | Frequency converter charge relay is attracted control device and control method |
| CN113922336A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信日立空调***有限公司 | Frequency converter protection device, frequency converter and air conditioner |
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| CN103427618B (en) * | 2013-06-24 | 2016-05-11 | 深圳市英威腾电气股份有限公司 | A kind of SS (soft start) control circuit |
| CN106452402A (en) * | 2015-08-04 | 2017-02-22 | 厦门雅迅网络股份有限公司 | Method for opening and closing device power supply through button |
| CN106452402B (en) * | 2015-08-04 | 2021-08-13 | 厦门雅迅网络股份有限公司 | Method for turning on and off power supply of equipment by key |
| CN106787867A (en) * | 2016-11-30 | 2017-05-31 | 上海航天控制技术研究所 | A kind of rate gyroscope power supply |
| CN106787867B (en) * | 2016-11-30 | 2019-09-06 | 上海航天控制技术研究所 | A kind of rate gyroscope power supply |
| CN107196493A (en) * | 2017-04-07 | 2017-09-22 | 深圳力工新能源科技有限公司 | The anti-input dash current circuit of automobile power source |
| CN106940400A (en) * | 2017-05-05 | 2017-07-11 | 深圳市诺尔安磁检测科技有限公司 | Phase angle on-off controller and its application method |
| CN108269714A (en) * | 2017-12-12 | 2018-07-10 | 上海海得控制***股份有限公司 | Relay crowbar circuit and control device |
| CN109342935A (en) * | 2018-10-08 | 2019-02-15 | 珠海格力电器股份有限公司 | Device and method for detecting failure of direct-current bus charging circuit relay and motor |
| CN110233578A (en) * | 2019-06-04 | 2019-09-13 | 浙江正泰电器股份有限公司 | Frequency converter charge relay is attracted control device and control method |
| CN113922336A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信日立空调***有限公司 | Frequency converter protection device, frequency converter and air conditioner |
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Effective date of registration: 20230331 Address after: 518000, 3rd Floor, Unit 1, Building 1, North Side of Jihe Expressway Interchange, Tangtou Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province, China Patentee after: Shenzhen Aodite Intelligent Control Technology Co.,Ltd. Address before: Guangdong city of Shenzhen province Baoan District Shiyan Street Renda Technology Park Renda building A building two floor Patentee before: SHENZHEN AUTITUDE ELECTRICAL TECHNIQUES Co.,Ltd. |
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