CN2500024Y - Voltage changing and frequency changing soft start energy saving controller - Google Patents
Voltage changing and frequency changing soft start energy saving controller Download PDFInfo
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- CN2500024Y CN2500024Y CN 01250356 CN01250356U CN2500024Y CN 2500024 Y CN2500024 Y CN 2500024Y CN 01250356 CN01250356 CN 01250356 CN 01250356 U CN01250356 U CN 01250356U CN 2500024 Y CN2500024 Y CN 2500024Y
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a voltage changing and frequency changing soft start energy-saving controller which belongs to the technical field of soft start energy-saving control of an alternating-current motor. The utility model mainly provides a soft start energy-saving controller which can ensure that a driving system has enough torque, the starting current is reduced, the working condition of a load is tracked, the energy is saved, a driving machine unit and an electric network is protected against impact, and the service life is prolonged. The utility model is characterized in that the voltage changing and frequency changing soft start energy saving controller comprises a single chip computer control system circuit, a voltage-frequency control circuit and a thyristor voltage regulating circuit, wherein the single chip computer control system circuit is composed of a single chip computer, a common peripheral circuit and a three-phase voltage electric current signal detecting circuit; the voltage-frequency control circuit is composed of a voltage phase changing circuit, a frequency changing circuit, a voltage-frequency processing circuit and a pulsed driving circuit. The utility model is mainly used for carrying out large torque direct start under the condition that electricity is supplied by a power frequency electrical source of the alternating-current motor, and the utility model is used for energy-saving operation under the state of a low load rate.
Description
Technical field
The utility model relates to a kind of flexible starter for electric motor energy-saving controller, is used for carrying out under the situation of alternating current motor power frequency supply power supply high-torque direct and connects energy-saving run under starting and the low load factor state.
Background technology
In existing alternating current motor solid-state start device, all adopt bidirectional thyristor inverse parallel phase control reduced voltage starting, since the torque of motor and voltage be divided equally into direct ratio, thereby starting torque is very little, impulse current is very big, generally can only be controlled at 3～4 times of motor rated current, can occur the phenomenon of stall, fail to start during a heavy duty.And adopt existing RHVC, and then cost is higher, and is not needing after the starting under the occasion of speed governing, and merit has waste serious, and is less economical.
Summary of the invention
The utility model mainly provides and a kind ofly is directly proportional with voltage squared according to starting torque in the starting process, the characteristic that is inversely proportional to the frequency of power supply, by reducing motor terminal voltage, change the control mode of supply frequency simultaneously, guarantee that dragging system has enough torques, cost performance is superior, reduces starting current simultaneously greatly, protection drags unit and electrical network is avoided impacting, and prolongs service life of equipment; Operating state of following the tracks of load in service, the alternating current motor variable voltage variable frequency soft-start energy-saving controller of energy savings.
Technical solution of the present utility model is: a kind of variable voltage variable frequency soft-start energy-saving controller, it is characterized in that: comprise the single chip machine controlling circuit that constitutes by single-chip microcomputer and peripheral circuit thereof and three-phase voltage current signal detection circuit, the voltage-frequency control circuit of forming by voltage-phase transfer circuit, frequency-conversion circuit, voltage-frequency processing circuit and pulse driving circuit, and thyristor voltage regulation circuit.
Voltage-frequency control circuit described in the utility model technical solution can be made up of voltage-regulating circuit, operational amplifier, phase-shift circuit, gate circuit, trigger and pulse driving circuit.
Three-phase voltage current signal detection circuit described in the utility model technical solution can be made up of the electric pressure converter and the Hall current transmitter that are arranged on the motor three-phase power line.
The utility model is owing to adopt the single-chip computer control system circuit that is made of single-chip microcomputer and peripheral circuit thereof and three-phase voltage current signal detection circuit, by voltage-phase transfer circuit, frequency-conversion circuit, the voltage-frequency control circuit that voltage-frequency processing circuit and pulse driving circuit are formed, and thyristor voltage regulation circuit, thereby, after the electrical network power frequency variable voltage signal that detects can being handled by the single-chip computer control system circuit computing, the pulse signal that forms directly connects with the control utmost point of thyristor voltage regulation circuit by voltage-frequency processing circuit, control the voltage-frequency ratio of alternating current motor input voltage by the phase shift signal that changes thyristor, reach the purpose of soft start, and enter the power-frequency voltage operation automatically.The utility model is in underloading, Light Condition once detect motor, can control the motor input voltage automatically, makes motor be in the energy-saving run state, to reach purpose of energy saving.
The utility model is owing to adopted the direct voltage to frequency conversion technology of friendship-friendship in control, its advantage is that motor is realized control of soft, starting torque and starting current are controlled in the proper range, promptly avoid the impact of excessive starting torque and starting current to dragging motor and electrical network, simultaneously owing to reduced starting current, reduce loss, improved starting performance, improved the starting success rate of system under the big quiet resistive torque.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model; Fig. 2 is the circuit diagram of voltage-frequency control circuit among Fig. 1.
Embodiment
As shown in Figure 1 and Figure 2.Single-chip microcomputer 10 adopts the D8751 single-chip microcomputer.TMS2864 memory 11, AD0803A/D change-over circuit 12, display control circuit 5 comprise that keyboard input unit and light-emitting diode display constitute the peripheral circuit of single-chip microcomputer 10.TB002 electric pressure converter 1 and HDC-200F Hall current transmitter 3 are arranged on motor 4 three-phase power lines, constitute the three-phase voltage current signal detection circuit, are connected with A/D change-over circuit 12.Single-chip microcomputer 10, peripheral circuit 5,11,12 and three-phase voltage current signal detection circuit 1,3 are formed the single-chip computer control system circuit.Thyristor voltage regulation circuit 2 adopts thyristor module, is made up of the thyristor module that three groups of inverse parallels connect.Voltage-phase transfer circuit 7, frequency-conversion circuit 6, voltage-frequency processing circuit 8 and pulse driving circuit 9 are formed voltage-frequency control circuit.Voltage-phase transfer circuit 7 is made up of X9112 voltage-regulating circuit 13, LM324 operational amplifier 14 and TC785 phase-shift circuit 15.Frequency-conversion circuit 6 is made up of MC4081 gate circuit 16,4069 gate circuits 17 and 4502 triggers 18.Voltage-frequency processing circuit 8 is made up of X9112 voltage-regulating circuit 13,4069 gate circuits 17 and 4502 triggers 18.Pulse driving circuit 9 is a custom circuit.
Single-chip microcomputer 10 takes out corresponding data according to parameter is set from memory 11, after the calculation process, frequency instruction is delivered to gate circuit 17, and voltage instruction is delivered to voltage-regulating circuit 13.Deliver to gate circuit 16 after the conversion process of frequency instruction through gate circuit 17, trigger 18.Voltage instruction is handled, is cushioned through voltage-regulating circuit 13, operational amplifier 14, delivers to phase-shift circuit 15, and phase-shift circuit 15 is converted to phase shift signal with voltage instruction and delivers to gate circuit 16.Gate circuit 16 is with voltage and the comprehensive pulse signal of formation voltage, changeable frequency afterwards of frequency instruction, deliver in the pulse driving circuit 9, after pulse drive circuit 9 processing and amplifying, issue the control utmost point of thyristor voltage regulation circuit 2, finish voltage-frequency control soft start, and control makes starting current minimum, can reach in the rated current, energy-saving and cost-reducing.In the main frame running, by the load operation conditions parameter that obtains, carry out calculation process through single-chip microcomputer 10 and obtain best power factor (PF) phase angle, voltage phase transformation circuit 7 is realized the operation of load optimum state, reaches the energy-saving run under the sky light condition.
Claims (3)
1, a kind of variable voltage variable frequency soft-start energy-saving controller, it is characterized in that: comprise single-chip computer control system circuit by single-chip microcomputer (10) and peripheral circuit and three-phase voltage current signal detection circuit (1,3) formation, the voltage-frequency control circuit of forming by voltage-phase transfer circuit (7), frequency-conversion circuit (6), voltage-frequency processing circuit (8) and pulse driving circuit (9), and thyristor voltage regulation circuit (2).
2, a kind of variable voltage variable frequency soft-start energy-saving controller according to claim 1 is characterized in that: described voltage-frequency control circuit is made up of voltage-regulating circuit (13), operational amplifier (14), phase-shift circuit (5), gate circuit (16,17), trigger (18) and pulse driving circuit (9).
3, a kind of variable voltage variable frequency soft-start energy-saving controller according to claim 1 and 2 is characterized in that: described three-phase voltage current signal detection circuit is made up of the electric pressure converter (1) and the Hall current transmitter (3) that are arranged on the motor three-phase power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01250356 CN2500024Y (en) | 2001-08-10 | 2001-08-10 | Voltage changing and frequency changing soft start energy saving controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01250356 CN2500024Y (en) | 2001-08-10 | 2001-08-10 | Voltage changing and frequency changing soft start energy saving controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2500024Y true CN2500024Y (en) | 2002-07-10 |
Family
ID=33660537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01250356 Expired - Fee Related CN2500024Y (en) | 2001-08-10 | 2001-08-10 | Voltage changing and frequency changing soft start energy saving controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2500024Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356685C (en) * | 2003-03-14 | 2007-12-19 | 村田机械株式会社 | Electric motor controller of textile machine |
| CN101411052B (en) * | 2006-07-26 | 2012-04-18 | 荣信电力电子股份有限公司 | Soft startup method and apparatus for pole frequency conversion motor |
| CN105680731A (en) * | 2016-03-30 | 2016-06-15 | 西安西普电力电子有限公司 | AC driver and processing method thereof |
-
2001
- 2001-08-10 CN CN 01250356 patent/CN2500024Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356685C (en) * | 2003-03-14 | 2007-12-19 | 村田机械株式会社 | Electric motor controller of textile machine |
| CN101411052B (en) * | 2006-07-26 | 2012-04-18 | 荣信电力电子股份有限公司 | Soft startup method and apparatus for pole frequency conversion motor |
| CN105680731A (en) * | 2016-03-30 | 2016-06-15 | 西安西普电力电子有限公司 | AC driver and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |