CN101868090A - Circuit for dimming or speed regulation control and control method - Google Patents
Circuit for dimming or speed regulation control and control method Download PDFInfo
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Abstract
The invention relates to the field of dimming and speed regulation related to illumination, motors and electronics, in particular to a motor-driven circuit for dimming or speed regulation control which is suitable for illumination of a silicon-controlled dimmer or adjustment of a silicon-controlled speed regulator and a control method. A detection compensation circuit for maintaining the normal work of the silicon-controlled dimmer consists of a voltage detection circuit, a current detection circuit, a follow current compensation circuit and a power factor compensation circuit; the on-off running state of the silicon-controlled dimmer or speed regulator is detected by a detection method combining output voltage change and current change of the silicon-controlled dimmer or speed regulator; the on-off and trigger running conditions of the silicon-controlled dimmer are provided by adopting a compensation method combining power factor compensation and follow current compensation; a control circuit of a load consists of a datum transformation circuit, an output duty cycle control circuit, an output current control circuit and a drive output circuit and produces a control signal by detecting mains supply AC phase-shedding operation output of the silicon-controlled dimmer or speed regulator; and the output power of the load is controlled by a load output duty cycle and load working current compound control method so as to realize large output power adjustable range of the load and high linearity of the adjusting process.
Description
Technical field
The present invention relates to a kind of illumination, light modulation, speed governing field that motor is relevant with electronics, specifically, relate to a kind of controllable silicon light modulation illumination or speed regulator of being applicable to and regulate motor-driven circuit and the control method that is used for light modulation or speed regulating control, belong to illumination, motor driving controling circuit manufacturing field.
Background technology
CN1843061A, title " are used for the light adjusting circuit of LED lighting apparatus and the device that keeps the TRIAC conducting ", it comprises provides dynamic dummy load, with when owing to the convergent oscillation in startup problem or the circuit, do not provide load to dimmer when the LED electronic device provides sufficient load, when LED and converter electronics thereof provided the abundant electric current that comes from dimmer to import, this dynamic dummy load provided the electric current of reduction.This system generally includes the power supply that electrically is connected to phase controlled light modulator, the AC power output that this phase controlled light modulator electrically is connected to described dimmer converts the converter circuit that the DC power of LED illuminalive power-supply is exported to, dynamic dummy load and converter circuit are parallel to be connected, and mute load response changes its electric current importing in the operation of converter circuit.Its weak point is: the one, and dynamic dummy load changes its electric current and imports in response to the operation of converter circuit, so-called " operation of converter circuit " is exactly that circuit drives (output) operation to LED, that is to say that " dynamic dummy load " drives the output size in response to the LED of " converter circuit ", mute load dynamic value reduced when LED driving output was big, otherwise then increase, because this described whole converter circuit belongs to capacitive structure, converter circuit drives the value of the transformation period point of output, might not be consistent at the load value of this time point with controllable silicon, because, LED converter circuit output amount of decrease appears, it generally is a low valley (output characteristic of PWM switching mode) that produces immediately behind an output of the circuit appearance peak value, should hang down the appearance of valley, the dynamic dummy load response, carry out the load value compensation, but, because the capacitive character feature of circuit, there is a capacitor charge and discharge time difference when this variation is reflected to controllable silicon dimmer, will causes the time of dynamic dummy load response one inaccurate (in advance); The 2nd, only rely on a dynamic dummy load to change its electric current imports provides load to dimmer method in response to the operation of converter circuit, will bigger invalid electrical piano power loss appears.
Summary of the invention
One of design order of the present invention, design a kind of electricity-saving lamp that solves and directly replace the occasion that conventional incandescent is applied to lighting dimming, the electricity-saving lamp light modulation drive circuit that a kind of civil power controllable silicon dimmer of using with ordinary incandescent lamp is provided is application, to realize the adjusting of CFL lighting brightness, has good dimming effect, dimming scope is big, loss is low, efficient is high.
Two of purpose of design of the present invention, the control method that affords redress reduces the electrical piano power loss of light modulation drive circuit and improves electronic drive circuitry efficient.
Three of purpose of design of the present invention exchanges cut operation output by regulating controllable silicon light modulation or speed regulator civil power, drive current that can control load, make load operating current can from less than 1 milliampere to changing at full capacity;
Four of purpose of design of the present invention exchanges cut operation output by regulating controllable silicon light modulation or speed regulator civil power, and energy control load output time duty ratio makes the maximum output duty cycle adjustable range of load can reach 0 to 100%.
Five of purpose of design of the present invention exchanges cut operation output by regulating controllable silicon light modulation or speed regulator civil power, can control electricity-saving lamp brightness and motor speed, moment.
In order to realize above-mentioned purpose of design, adopt controllable silicon light modulation or speed regulator output voltage size variation and size of current to change the detection method that combines, detect the running status of the blocking-up of controllable silicon light modulation or speed regulator, conducting; The compensation method of adopting power factor compensation and afterflow compensation to combine provides the trigger current of controllable silicon light modulation or speed regulator and keeps electric current, reaches the normal blocking-up of controllable silicon light modulation or speed regulator, the purpose of conducting running; Simultaneously, exchange cut operation output by detecting controllable silicon light modulation or speed regulator civil power, produce control signal, with the method for load output duty cycle and the compound control of loaded work piece electric current, the power output of control load realizes that the power output adjustable range of load is big, the adjustment process good linearity.
The controllable silicon dimmer that the present invention will use with the ordinary city electric incandescent lamp, the Method and circuits of realizing the light modulation of LED electricity-saving lamp constitutes example, set forth light modulation of the present invention or speed regulating method and circuit, the Method and circuits of being set forth only is a representative that realizes light modulation or speed-regulating function, never is the restriction to scope involved in the present invention:
The controllable silicon dimmer that the ordinary incandescent lamp light modulation is used is to be that core devices constitutes with the controllable silicon, be to realize its dimming function with the output size that controllable silicon is done blocking-up, conducting cut operation to civil power, controllable silicon dimmer must have the effect of an initial current could realize transferring conducting to by blocking-up down, and this initial current is called trigger current; And controllable silicon dimmer must have certain load current just can keep its conducting state, and this electric current is called keeps electric current, and controllable silicon dimmer has a wide range of applications in the occasion of incandescent lamp, and it is known by people to the characteristic that service conditions requires.Incandescent lamp belongs to pure resistive load, therefore, can stable trigger current is provided and keep electric current to controllable silicon dimmer; But, popular electricity-saving lamp or LED lamp generally adopts constant voltage or constant current switch power supply as drive circuit at present, this drive circuit is the capacity load feature, and the civil power during its operation exchanges the importing electric current and is pulse state, the stable trigger current of controllable silicon dimmer can't be provided and keep electric current.Therefore, when being load with the LED electricity-saving lamp, controllable silicon dimmer exchanges the cut operation waveform will produce distortion, especially can not keep good conducting state.
The present invention is with circuit such as detection, compensation, controls, can produce stable controllable silicon dimmer trigger current and keep electric current, and exchange the cut operation with controllable silicon dimmer and be output as power supply and control signal source, can control LED electricity-saving lamp power output, thereby make the LED electricity-saving lamp directly replace ordinary incandescent lamp, be applied to various occasions of carrying out the brightness regulation illumination with controllable silicon dimmer.
Technical scheme 1: the detection compensating circuit that is used for light modulation or speed-regulating control circuit, by voltage detecting circuit, current detection circuit, the afterflow compensating circuit, power factor compensation circuit constitutes, voltage detecting circuit exchanges the size variation that output voltage is operated in cut by the power end detection controllable silicon light modulation or the speed regulator of EMI and AC/DC change-over circuit, produce trigger current control signal and light modulation or speed regulating control signal, current detection circuit exchanges the size of current variation that the cut operation is exported by the power end detection controllable silicon light modulation or the speed regulator of EMI and AC/DC change-over circuit, produce controllable silicon light modulation or speed regulator and keep the dynamic compensation control signal of electric current, afterflow compensating circuit and voltage detecting circuit, the current detection circuit signal end connects and produces with the dynamic compensation control signal electric current of keeping of controllable silicon light modulation or speed regulator conducting, power factor compensation circuit is connected with afterflow compensating circuit signal end and imports current practice by control, the importing electric current of the output AC power source wave period of control controllable silicon light modulation or speed regulator reduces the required and raising Circuits System power factor of the compensation of keeping electric current.
Technical scheme 2: be used for the detection compensation method of light modulation or speed-regulating control circuit, adopt controllable silicon light modulation or speed regulator 1 interchange cut operation output voltage size variation and size of current to change the detection method that combines, detect the running status of controllable silicon light modulation or speed regulator 1 blocking-up, conducting; The compensation method of adopting power factor compensation and afterflow compensation to combine, the trigger current of controllable silicon light modulation or speed regulator is provided and keeps electric current, ensure normal blocking-up, the conducting of controllable silicon light modulation or speed regulator, and reduce electrical piano power loss and raising Circuits System efficient that the afterflow compensation is produced.
Technical scheme 3: by detecting light modulation or the speed-regulating control circuit that compensating circuit constitutes, it comprises controllable silicon light modulation or speed-regulating control circuit, voltage detecting circuit generation in described controllable silicon light modulation or the speed-regulating control circuit exchanges the pulse signal that cut operation output size changes synchronously with controllable silicon light modulation or speed regulator, this pulse signal is converted to level signal by the benchmark change-over circuit, this level signal acts on Drive and Control Circuit simultaneously by output duty cycle control circuit and output current control circuit, realizes the compound control of load output duty cycle and loaded work piece electric current; Current detection circuit in described controllable silicon light modulation or the speed-regulating control circuit detects controllable silicon light modulation or speed regulator exchanges the size of current variation that the cut operation is exported, and produces the dynamic compensation control signal that controllable silicon light modulation or speed regulator are kept electric current; Power factor compensation in described controllable silicon light modulation or the speed-regulating control circuit and afterflow compensation combine, provide afterflow compensation to satisfy controllable silicon light modulation or required electric current is kept in the speed regulator conducting by the afterflow compensating circuit, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally.
Technical scheme 4: by detecting the light modulation that compensating circuit constitutes or the control method of speed-regulating control circuit, with controllable silicon light modulation or speed regulator cut operation output size, Synchronization Control load output duty cycle and the size of loaded work piece electric current; With the method for load output duty cycle and the compound control of loaded work piece electric current, the power output of control load makes the power output adjustable range of load big, the adjustment process good linearity.
Technical scheme 5: a kind of light modulation or speed-regulating control circuit module, module input pin are respectively that voltage imports the detection pin, electric current imports and detects pin; The module output pin is respectively that afterflow compensation output connecting pin, power factor compensation drive pin, load output duty cycle and the compound control pin of loaded work piece electric current.
Technical scheme 6: the method for work of a kind of light modulation or speed-regulating control circuit module, voltage detecting circuit detects the voltage swing of controllable silicon light modulation speed regulator output, judge the blocking state of controllable silicon light modulation speed regulator AC-input voltage zero passage, produce the controllable silicon light modulation speed regulator and trigger compensating signal, and provide trigger current to the controllable silicon light modulation speed regulator by the afterflow compensating circuit, make the controllable silicon light modulation speed regulator can the triggered as normal conducting after the blocking-up of AC-input voltage zero passage; Current detection circuit detects the size of current of controllable silicon light modulation speed regulator output, keep electric current when judging controllable silicon light modulation speed regulator triggering and conducting, and by the afterflow compensating circuit to the controllable silicon light modulation speed regulator conducting keep electric current dynamic compensation be provided, make the controllable silicon light modulation speed regulator in turn-on cycle, keep normally; The operation equally loaded of power factor compensation circuit is at the importing electric current of AC power waveform in the cycle; The afterflow compensating circuit to the controllable silicon light modulation speed regulator when load current reduces and can not satisfy conducting and keep the electric current needs, provide the afterflow compensation to keep the electric current demand to satisfy the conducting of controllable silicon light modulation speed regulator, make the controllable silicon light modulation speed regulator in turn-on cycle, keep normally, and the method that adopts power factor compensation and afterflow compensation to combine, with the power factor that improves the light-adjusting and speed-adjusting control circuit system, reduce the offset that electric current is kept in the conducting of controllable silicon light modulation speed regulator; Load output duty cycle circuit is with controllable silicon light modulation or speed regulator cut operation output size, Synchronization Control load output duty cycle and the size of loaded work piece electric current, method with load output duty cycle and the compound control of loaded work piece electric current, the power output of control load, make the power output adjustable range of load big, the adjustment process good linearity, and it is big or small to exchange cut operation output according to the controllable silicon light modulation speed regulator, realizes that the maximum control range of load output duty cycle reaches 0～100%.
Technical scheme 7: by the method for load output duty cycle control load brightness, interchange cut operation output by the controllable silicon light modulation speed regulator, by voltage detecting circuit, benchmark change-over circuit, output duty cycle control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with the controllable silicon light modulation speed regulator, Drive and Control Circuit drives output duty cycle according to this signal controlling.
Technical scheme 8: by the method for loaded work piece Current Control load brightness, interchange cut operation output by the controllable silicon light modulation speed regulator, by voltage detecting circuit, benchmark change-over circuit, output current control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with the controllable silicon light modulation speed regulator, Drive and Control Circuit drives output current according to this signal controlling.
The present invention compares with background technology, and the one, adopt controllable silicon light modulation or speed regulator interchange cut operation output voltage size variation and size of current to change the detection method that combines, detect the running status of the blocking-up of controllable silicon light modulation or speed regulator, conducting; The compensation method of adopting power factor compensation and afterflow compensation to combine, the trigger current of controllable silicon light modulation or speed regulator is provided and keeps electric current, ensure normal blocking-up, the conducting running of controllable silicon light modulation or speed regulator, and the reduction afterflow compensates the electrical piano power loss that is produced and improves Circuits System efficient; The 2nd, adopt the method that detects controllable silicon light modulation or speed regulator interchange cut operation output voltage size variation, it is the voltage swing that detects controllable silicon light modulation or speed regulator output by voltage detecting circuit, judge the blocking state of controllable silicon light modulation or speed regulator AC-input voltage zero passage, produce controllable silicon light modulation or speed regulator and trigger compensating signal, and provide trigger current to controllable silicon light modulation or speed regulator by the afterflow compensating circuit, make controllable silicon light modulation or the speed regulator can the triggered as normal conducting after the blocking-up of AC-input voltage zero passage; The 3rd, adopt the method that detects controllable silicon light modulation or speed regulator interchange cut operation output current size variation, it is the size of current that detects controllable silicon light modulation or speed regulator output by current detection circuit, keep electric current when judging controllable silicon light modulation or speed regulator triggering and conducting, and provide dynamic compensation to the electric current of keeping of controllable silicon light modulation or speed regulator conducting by the afterflow compensating circuit, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally; The 4th, the method that adopts power factor compensation and afterflow to compensate, provide afterflow compensation to satisfy controllable silicon light modulation or the electric current demand is kept in the speed regulator conducting, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally, and the method that adopts power factor compensation and afterflow compensation to combine, with the power factor that improves light modulation or speed-regulating control circuit system, reduce to keep the offset that electric current is kept in controllable silicon light modulation or speed regulator conducting, reach energy-conservation, purpose efficiently; The 5th, by light modulation, voltage detecting circuit in the detection compensating circuit of speed-regulating control circuit detects controllable silicon light modulation or speed regulator exchanges the size variation that output voltage is operated in cut, produce trigger current control signal and light modulation or speed regulating control signal, detect the size of current variation of controllable silicon light modulation or speed regulator interchange cut operation output by the current detection circuit in the detection compensating circuit, produce controllable silicon light modulation or speed regulator and keep the dynamic compensation control signal of electric current, by detect in the compensating circuit the afterflow compensating circuit and with the electric current of keeping of dynamic compensation control signal compensation controllable silicon light modulation or speed regulator conducting, import current practice by the power factor compensation circuit in the testing circuit by control, the importing electric current of the output AC power source wave period of control controllable silicon light modulation or speed regulator is to reduce the electrical piano power loss that is produced because of the afterflow compensation and to improve the Circuits System power factor; The 6th, adopt with controllable silicon light modulation or speed regulator cut operation output size, Synchronization Control load output duty cycle and the size of loaded work piece electric current; With the method for load output duty cycle and the compound control of loaded work piece electric current, the power output of control load makes the power output adjustable range of load big, the adjustment process good linearity; The 7th, the method that adopts the load output duty cycle to control, be interchange cut operation output by controllable silicon light modulation or speed regulator, by voltage detecting circuit, benchmark change-over circuit, output duty cycle control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with controllable silicon light modulation or speed regulator, Drive and Control Circuit drives output duty cycle according to this signal controlling; The 8th, the control method of employing loaded work piece electric current, be interchange cut operation output by controllable silicon light modulation or speed regulator, by voltage detecting circuit, benchmark change-over circuit, output current control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with controllable silicon light modulation or speed regulator, Drive and Control Circuit drives output current according to this signal controlling; The 9th, a kind of light modulation or speed-regulating control circuit, it comprises voltage detecting circuit, benchmark change-over circuit, output duty cycle control circuit, output current control circuit, Drive and Control Circuit.It is characterized in that: exchange the pulse signal that cut operation output size changes synchronously with controllable silicon light modulation or speed regulator by the voltage detecting circuit generation, this pulse signal is converted to level signal by the benchmark change-over circuit, this level signal is by output duty cycle control circuit and output current control circuit, act on Drive and Control Circuit simultaneously, realize the compound control of load output duty cycle and loaded work piece electric current; The tenth, the present invention relates to a load output duty cycle circuit; Exchange cut operation output size according to controllable silicon light modulation or speed regulator, realize that the maximum control range of load output duty cycle reaches 0～100%.
Description of drawings
Accompanying drawing 1 is the structured flowchart of light modulation or speed drive circuit.
Accompanying drawing 4 is three primary colors (gas discharge) electricity-saving lamp light adjusting circuit output stage logical construction schematic diagrames.
Accompanying drawing 6 is interlock circuit working point output waveform schematic diagrames.
Embodiment
Embodiment 1: with reference to attached Fig. 1 and 2.The detection compensating circuit that is used for light modulation or speed-regulating control circuit, by voltage detecting circuit 3, current detection circuit 4, afterflow compensating circuit 5, power factor compensation circuit 6 constitutes, voltage detecting circuit 3 exchanges the size variation that output voltage is operated in cut by the power end detection controllable silicon light modulation or the speed regulator 1 of EMI and AC/DC change-over circuit 2, produce trigger current control signal and light modulation or speed regulating control signal, current detection circuit 4 exchanges the size of current variation that the cut operation is exported by the power end detection controllable silicon light modulation or the speed regulator 1 of EMI and AC/DC change-over circuit 2, produce controllable silicon light modulation or speed regulator and keep the dynamic compensation control signal of electric current, afterflow compensating circuit 5 and voltage detecting circuit 3, current detection circuit 4 signal ends connect and produce with the dynamic compensation control signal electric current of keeping of controllable silicon light modulation or speed regulator 1 conducting, power factor compensation circuit 6 is connected with afterflow compensating circuit 5 signal ends and imports current practice by control, the importing electric current of the output AC power source wave period of control controllable silicon light modulation or speed regulator 1 reduces the required and raising Circuits System power factor of the compensation of keeping electric current.
Example: accompanying drawing 2 is non-isolation output LED electricity-saving lamp brightness adjustment control drive circuit application examples, and civil power is done to connect EMI and AC/DC change-over circuit after the cut operation through controllable silicon dimmer, finishes the AC and DC conversion; Importing voltage detecting circuit, importing current detection circuit, afterflow compensating circuit, power factor compensation circuit are formed the detection compensating circuit of keeping the controllable silicon dimmer operate as normal, the service conditions that provides controllable silicon dimmer to finish blocking-up, triggering, conducting is the key that keeps the controllable silicon dimmer operate as normal; Benchmark change-over circuit, output duty cycle control circuit, output current control circuit, driving output circuit are formed the control circuit of load, and the power output of control load reaches the purpose of light modulation or speed governing.
1, the detection of adjusting control circuit compensation: when civil power alternating voltage cycle zero passage, controllable silicon dimmer is because of losing input voltage and electric current is blocked.During the controllable silicon dimmer blocking-up, import the voltage detecting circuit output low level, the afterflow compensating circuit is low resistance state, controllable silicon dimmer trigger current loop is provided, thereby makes controllable silicon dimmer in civil power alternating voltage cycle, finish triggering and conducting (decision is regulated by controllable silicon dimmer in the triggered time angle).After the controllable silicon dimmer triggering and conducting, current detection circuit detects the controllable silicon dimmer output current, when the controllable silicon dimmer load current when keeping electric current, the control afterflow compensating circuit current circuit that affords redress ensures that controllable silicon dimmer keeps conducting in civil power alternating voltage cycle.As shown in Figure 2, the operating state, the output that import voltage detecting circuit detection controllable silicon dimmer exchange the pulse signal of cut operation respective width with controllable silicon dimmer, and export afterflow compensating circuit, benchmark change-over circuit to; For example: after the civil power zero passage, controllable silicon dimmer imports voltage detecting circuit control afterflow compensating circuit and is low resistance state because of losing input voltage and electric current is blocked, and forms controllable silicon dimmer and triggers working current loop, correctly triggers to guarantee controllable silicon dimmer; After controllable silicon dimmer was finished triggering and conducting, voltage detecting circuit control afterflow compensating circuit was high-impedance state, and so far, the afterflow compensating circuit triggers compensation process to controllable silicon and finishes.Importing current detection circuit is controllable silicon dimmer output current detecting unit, and when the controllable silicon dimmer output current was kept electric current greater than the controllable silicon conducting, the afterflow compensating circuit was high-impedance state; When load output reduces or other factors (circuit capacitive reactance, induction reactance etc.) cause the controllable silicon dimmer output current to reduce or when interrupting, import current detection circuit control afterflow compensating circuit and be low resistance state, this resistance state value increases with the controllable silicon dimmer output current, reduce and reduce with the controllable silicon dimmer output current, make circuit produce a suitable leakage current, to keep controllable silicon dimmer normally state; Thereby this circuit has guaranteed the triggered as normal and the conducting of controllable silicon dimmer, finishes controllable silicon dimmer civil power cut output.
It should be noted that: 1, this circuit adopts and imports voltage, current detection circuit, detect the zero passage blocking-up of controllable silicon dimmer and the state of triggering and conducting, and the one or more transistors of control afterflow compensating circuit are closed or the value of conducting, necessary condition when setting up controllable silicon dimmer triggering and conducting makes controllable silicon dimmer normally exchange the cut operation under the control of this circuit.2, this circuit utilizes the change in voltage of controllable silicon dimmer blocking-up or conducting output, produce and the synchronous impulse level signal of controllable silicon dimmer cut operation, and with this pulse as load power output control signal.
2, power factor compensation: make to import current waveform tracking input voltage waveform, make the importing electric current approach sine, the purpose of control input current and output voltage values plays the stability that improves the system power factor, improve load driving voltage, reduces and keep controllable silicon dimmer and keep the effects such as loss that the afterflow compensation is produced.
Power factor compensation circuit as shown in accompanying drawing 2, utilize the Boost circuit to realize that the principle of High Power Factor is to make to import current following importing voltage exactly, and the output voltage of acquisition expectation, typical circuit can adopt (Boost) boost PFC circuit working mode under the continuous current mode (CCM), and the required parameter of power factor compensation circuit comprises instant importing voltage, imports electric current and output voltage.When output voltage departs from desired value, when falling as output voltage, the output voltage of voltage control link increases, and makes the also corresponding increase of output of multiplier, imports the also corresponding increase of current effective value thereby make, to keep enough output voltages.The effective value that imports electric current is realized modulation by the output voltage controlling unit, make the importing electric current be synchronized with the variation of importing voltage rule and import the Current Control link, make control circuit in whole input voltage cycle, all can intercept electric current, and make the importing electric current approach sine, reach the purpose of the power factor that improves light modulation or speed-regulating control circuit system.
It should be noted that: power factor compensation circuit in the present invention is not to play the power factor compensation effect merely, but make light modulation or speed-regulating control circuit in whole alternating current input power supplying waveform, all can intercept electric current by power factor compensation circuit, both improve the power factor of entire circuit, and provided the controllable silicon dimmer conducting to keep electric current again.In light modulation or alignment circuit, add described power factor compensation circuit, can reduce the controllable silicon dimmer conducting and keep the afterflow offset, thereby, play and reduce light modulation or speed-regulating control circuit system loss and raise the efficiency and stable.
3, load control: the size that exchanges the cut angle with controllable silicon dimmer produces control signal, and the method with load output duty cycle and the compound adjustment of loaded work piece electric current reaches the control load power output.
Benchmark change-over circuit as shown in accompanying drawing 2, output duty cycle control circuit, output current control circuit, driving output circuit are formed load control circuit.The benchmark change-over circuit becomes corresponding level signal according to the output pulses switch of above-mentioned importing voltage detecting circuit, output duty cycle control circuit and output current control circuit produce duty cycle control signal and current controling signal according to the output level of benchmark change-over circuit, duty cycle control signal and current controling signal act on Drive and Control Circuit simultaneously, make it to produce the compound pwm control signal of high and low frequency double frequency (output waveform sees Fig. 6 for details), realize the control of load power output size.
It should be noted that: 1, circuit at the corresponding levels is with the control level signal of benchmark change-over circuit generation, the control load power output, be characterized in by (low frequency PWM) output duty cycle control circuit and (high-frequency PWM) output current control circuit, adopt the mode of output duty cycle and the compound control of output current, widen load power output adjustable range, realize that load (light modulation, speed governing) power output controlled range is big, the purpose of good linearity (especially LED electricity-saving lamp visual brightness change has more linear effects), have more advantage than background technology.
2, power factor compensation: make to import current waveform tracking input voltage waveform, make the importing electric current approach sine, the purpose of control input current and output voltage values plays the stability that improves the system power factor, improve load driving voltage, reduces and keep controllable silicon dimmer and keep the effects such as loss that the afterflow compensation is produced.
Power factor compensation circuit as shown in accompanying drawing 2, be exactly in circuit, to add the DC-DC switch converters, use the method that imports voltage detecting and current feedback, adjust the switch mosfet duty ratio, typical circuit adopts (BOOST) type that the boosts pfc circuit working method under the continuous current mode (CCM), change electric current adjustment pipe (MOSFET) duty cycle of switching by the variation of following the tracks of input voltage, make circuit in whole input voltage cycle, all can intercept electric current, and make the importing electric current approach sine, reach the purpose of the power factor that improves light modulation or speed-regulating control circuit system.
It should be noted that: power factor compensation circuit in the present invention is not to play the power factor compensation effect merely, but make light modulation or speed-regulating control circuit in whole alternating current input power supplying waveform, all can intercept electric current by power factor compensation circuit, both improve the power factor of entire circuit, and provided the controllable silicon dimmer conducting to keep electric current again.In light modulation or alignment circuit, add described power factor compensation circuit, can reduce the controllable silicon dimmer conducting and keep the afterflow offset, thereby, play and reduce light modulation or speed-regulating control circuit system loss and raise the efficiency and stable.
3, load control: the size that exchanges the cut angle with controllable silicon dimmer produces control signal, and the method with load output duty cycle and the compound adjustment of loaded work piece electric current reaches the control load power output.
Benchmark change-over circuit as shown in accompanying drawing 2, output duty cycle control circuit, output current control circuit, driving output circuit are formed load control circuit.The benchmark change-over circuit becomes corresponding level signal according to the output pulses switch of above-mentioned importing voltage detecting circuit, output duty cycle control circuit and output current control circuit produce duty cycle control signal and current controling signal according to the output level of benchmark change-over circuit, duty cycle control signal and current controling signal act on Drive and Control Circuit simultaneously, make it to produce the compound pwm control signal of high and low frequency double frequency (output waveform sees Fig. 6 for details), realize the control of load power output size.
It should be noted that: 1, circuit at the corresponding levels is with the control level signal of benchmark change-over circuit generation, the control load power output, be characterized in by (low frequency PWM) output duty cycle control circuit and (high-frequency PWM) output current control circuit, adopt the mode of output duty cycle and the compound control of output current, widen load power output adjustable range, realize that load (light modulation, speed governing) power output controlled range is big, the purpose of good linearity (especially LED electricity-saving lamp visual brightness change has more linear effects), have more advantage than background technology.
Embodiment 2: on the basis of embodiment 1, with reference to accompanying drawing 3.Be used for the detection compensation method of light modulation or speed-regulating control circuit, adopt controllable silicon light modulation or speed regulator 1 interchange cut operation output voltage size variation and size of current to change the detection method that combines, detect the running status of controllable silicon light modulation or speed regulator 1 blocking-up, conducting; The compensation method of adopting power factor compensation and afterflow compensation to combine, the trigger current of controllable silicon light modulation or speed regulator is provided and keeps electric current, ensure normal blocking-up, the conducting of controllable silicon light modulation or speed regulator, and reduce electrical piano power loss and raising Circuits System efficient that the afterflow compensation is produced.
Described detection controllable silicon light modulation or speed regulator exchange the method for cut operation output voltage size variation, it is the voltage swing that detects controllable silicon light modulation or speed regulator output by voltage detecting circuit, judge the blocking state of controllable silicon light modulation or speed regulator AC-input voltage zero passage, produce controllable silicon light modulation or speed regulator and trigger compensating signal, and provide trigger current to controllable silicon light modulation or speed regulator by the afterflow compensating circuit, make controllable silicon light modulation or the speed regulator can the triggered as normal conducting after the blocking-up of AC-input voltage zero passage.
Described detection controllable silicon light modulation or speed regulator exchange the method for cut operation output current size variation, it is the size of current that detects controllable silicon light modulation or speed regulator output by current detection circuit, keep electric current when judging controllable silicon light modulation or speed regulator triggering and conducting, and by the afterflow compensating circuit electric current is kept in controllable silicon light modulation or speed regulator conducting dynamic compensation is provided, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally.
The method of described power factor compensation and afterflow compensation is that operation equally loaded by power factor compensation circuit is at the importing electric current of AC power waveform in the cycle; By the afterflow compensating circuit to controllable silicon light modulation or speed regulator when load current reduces and can not satisfy conducting and keep the electric current needs, provide afterflow compensation to satisfy controllable silicon light modulation or the electric current demand is kept in the speed regulator conducting, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally, and the method that adopts power factor compensation and afterflow compensation to combine, with the power factor that improves light modulation or speed-regulating control circuit system, reduce the offset that electric current is kept in controllable silicon light modulation or speed regulator conducting, reach energy-conservation, purpose efficiently.
Example: accompanying drawing 3 is the logical constructions that drive the output circuit application example with the LED electricity-saving lamp of isolating transformer output, and detection compensation, power factor compensation, load control circuit and the method for the adjusting control circuit of this routine front end are described identical with embodiment 1; Different only is electric energy to be outputed to (LED) load by an isolating transformer, reaches the purpose of electrical security.
Embodiment 3: with reference to accompanying drawing 1～3.By detecting light modulation or the speed-regulating control circuit that compensating circuit constitutes, it comprises controllable silicon light modulation or speed-regulating control circuit, voltage detecting circuit 3 generations in described controllable silicon light modulation or the speed-regulating control circuit exchange the pulse signal that cut operation output size changes synchronously with controllable silicon light modulation or speed regulator 1, this pulse signal is converted to level signal by benchmark change-over circuit 7, this level signal acts on Drive and Control Circuit 10 simultaneously by output duty cycle control circuit 8 and output current control circuit 9, realizes the compound control of load output duty cycle and loaded work piece electric current; Current detection circuit 4 in described controllable silicon light modulation or the speed-regulating control circuit detects controllable silicon light modulation or speed regulator 1 exchanges the size of current variation that the cut operation is exported, and produces the dynamic compensation control signal that controllable silicon light modulation or speed regulator are kept electric current; Power factor compensation 6 in described controllable silicon light modulation or the speed-regulating control circuit and afterflow compensation 5 combine, provide afterflow compensation to satisfy controllable silicon light modulation or required electric current is kept in the speed regulator conducting by afterflow compensating circuit 5, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally.
Embodiment 4: on the basis of embodiment 3, by detecting the light modulation that compensating circuit constitutes or the control method of speed-regulating control circuit, with controllable silicon light modulation or speed regulator cut operation output size, Synchronization Control load output duty cycle and the size of loaded work piece electric current; With the method for load output duty cycle and the compound control of loaded work piece electric current, the power output of control load makes the power output adjustable range of load big, the adjustment process good linearity.
The method of described load output duty cycle control, be interchange cut operation output by controllable silicon light modulation or speed regulator, by voltage detecting circuit, benchmark change-over circuit, output duty cycle control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with controllable silicon light modulation or speed regulator, Drive and Control Circuit drives output duty cycle according to this signal controlling.
The control method of described loaded work piece electric current, be interchange cut operation output by controllable silicon light modulation or speed regulator, by voltage detecting circuit, benchmark change-over circuit, output current control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with controllable silicon light modulation or speed regulator, Drive and Control Circuit drives output current according to this signal controlling.
Embodiment 5: with reference to accompanying drawing 4.On the basis of the foregoing description, accompanying drawing 4 is logical constructions that three primary colors (gas discharge) electricity-saving lamp drives the output circuit application example, detection compensation, power factor compensation, load control circuit and the method for the adjusting control circuit of this routine front end are described identical with embodiment 1; Different is that load is three primary colors (gas discharge) power saving fluorescent lampss, realizes the purpose of controllable silicon dimmer adjusting trichromatic energy saving lamp power output (brightness).
Embodiment 6: with reference to accompanying drawing 5.On the basis of embodiment 1 and 2, accompanying drawing 5 is logical constructions that a direct current machine drives the output circuit application example, and detection compensation, power factor compensation, load control circuit and the method for the speed-regulating control circuit of this routine front end are described identical with embodiment 1; Different is that load is a direct current machine, realizes the purpose of silicon controlled speed regulator adjusting direct current machine power output (rotating speed, moment).
Embodiment 7: with reference to accompanying drawing 2.A kind of light modulation or speed-regulating control circuit module, module input pin are respectively that voltage imports detection pin 1, electric current imports and detects pin 8; The module output pin is respectively that afterflow compensation output connecting pin 7, power factor compensation drive pin 3, load output duty cycle and the compound control pin 12 of loaded work piece electric current, and Boost DC-DC conversion output voltage feedback pin 4, AC synchronous pulse output connecting pin 9, control level input pin 10, load output current detect pin 11.
The peripheral circuit that is connected with voltage importing detection pin is the input voltage sample circuit; It is the input current sample circuit that electric current imports the peripheral circuit that detects the pin connection; The peripheral circuit that is connected with controllable silicon afterflow compensation output connecting pin is the current drain circuit; The peripheral circuit that is connected with power factor compensation driving pin is a Boost DC-DC translation circuit; The peripheral circuit that is connected with the compound control pin of load output duty cycle and load current is a load driving circuits.
Boost DC-DC conversion output voltage feedback pin is pfc circuit voltage control loop in module, and the loaded work piece voltage sample circuit outer with module is connected; Described AC synchronous pulse output connecting pin is to import the pulse-generating circuit that voltage detecting circuit forms in module, and the RC integrating circuit outer with module is connected; Described control level input pin is to connect output duty cycle control circuit and output current control circuit in module, and the RC integrating circuit output outer with module is connected; It is that output current control circuit and Drive and Control Circuit form the loaded work piece current regulator in module that described load output current detects pin, and the loaded work piece current sampling circuit outer with module is connected.
Embodiment 8: on the basis of embodiment 7, the method of work of a kind of light modulation or speed-regulating control circuit module, it is characterized in that: voltage detecting circuit detects the voltage swing of controllable silicon light modulation speed regulator output, judge the blocking state of controllable silicon light modulation speed regulator AC-input voltage zero passage, produce the controllable silicon light modulation speed regulator and trigger compensating signal, and provide trigger current to the controllable silicon light modulation speed regulator by the afterflow compensating circuit, make the controllable silicon light modulation speed regulator can the triggered as normal conducting after the blocking-up of AC-input voltage zero passage; Current detection circuit detects the size of current of controllable silicon light modulation speed regulator output, keep electric current when judging controllable silicon light modulation speed regulator triggering and conducting, and by the afterflow compensating circuit to the controllable silicon light modulation speed regulator conducting keep electric current dynamic compensation be provided, make the controllable silicon light modulation speed regulator in turn-on cycle, keep normally; The operation equally loaded of power factor compensation circuit is at the importing electric current of AC power waveform in the cycle; The afterflow compensating circuit to the controllable silicon light modulation speed regulator when load current reduces and can not satisfy conducting and keep the electric current needs, provide the afterflow compensation to keep the electric current demand to satisfy the conducting of controllable silicon light modulation speed regulator, make the controllable silicon light modulation speed regulator in turn-on cycle, keep normally, and the method that adopts power factor compensation and afterflow compensation to combine, with the power factor that improves the light-adjusting and speed-adjusting control circuit system, reduce the offset that electric current is kept in the conducting of controllable silicon light modulation speed regulator; Load output duty cycle circuit is with controllable silicon light modulation or speed regulator cut operation output size, Synchronization Control load output duty cycle and the size of loaded work piece electric current, method with load output duty cycle and the compound control of loaded work piece electric current, the power output of control load, make the power output adjustable range of load big, the adjustment process good linearity, and it is big or small to exchange cut operation output according to the controllable silicon light modulation speed regulator, realizes that the maximum control range of load output duty cycle can reach 0～100%.
What need understand is: the present invention is be foundation with the interchange cut output (or AC and DC pulse power) that detects controllable silicon light modulation or speed regulator, the light modulation or the speed governing of realization load; And, waveform (preceding cut or back cut) to the input power supply is also insensitive, not only be suitable for adopting common controllable silicon light modulation or speed regulator to carry out light modulation or speed governing, be suitable for adopting the interchange of numerical control low frequency pulse-width modulation or DC power supply to carry out light modulation or speed governing equally by the present invention by the present invention; Not only be suitable for LED and three primary colors (gas discharge) electricity-saving lamp and other all kinds of light fixtures that are adapted to the PWM drive pattern adopt common controllable silicon dimmer to carry out light modulation by the present invention; being adapted to direct current machine equally adopts common silicon controlled speed regulator to carry out speed governing by the present invention; therefore; though the foregoing description is to implementation method of the present invention and the structure detailed text description of contrasting; but these text descriptions; just the simple text of mentality of designing of the present invention and logical construction is described; rather than to the restriction of mentality of designing of the present invention and circuit form (comprising discrete component or integrated circuit); any combination that does not exceed mentality of designing of the present invention; increase or modification, all fall within the scope of protection of the present invention.
Claims (13)
1. detection compensating circuit that is used for light modulation or speed-regulating control circuit, it is characterized in that by voltage detecting circuit, current detection circuit, the afterflow compensating circuit, power factor compensation circuit constitutes, voltage detecting circuit exchanges the voltage swing variation that the cut operation is exported by the output detection controllable silicon light modulation or the speed regulator of EMI and AC/DC change-over circuit, produce trigger current control signal and light modulation or speed regulating control signal, current detection circuit exchanges the size of current variation that the cut operation is exported by the output detection controllable silicon light modulation or the speed regulator of EMI and AC/DC change-over circuit, produce controllable silicon light modulation or speed regulator and keep the dynamic compensation control signal of electric current, afterflow compensating circuit and voltage detecting circuit, the current detection circuit signal end connects and keeps electric current with the trigger current and the conducting of dynamic compensation control signal generation controllable silicon light modulation or speed regulator, power factor compensation circuit control imports current practice, the importing electric current of the output AC power source wave period of control controllable silicon light modulation or speed regulator reduces the required and raising Circuits System power factor of the compensation of keeping electric current.
2. detection compensation method that is used for light modulation or speed-regulating control circuit, it is characterized in that: adopt controllable silicon light modulation or speed regulator interchange cut operation output voltage size variation and size of current to change the detection method that combines, detect the running status of the blocking-up of controllable silicon light modulation or speed regulator, conducting; The compensation method of adopting power factor compensation and afterflow compensation to combine, the trigger current of controllable silicon light modulation or speed regulator is provided and keeps electric current, ensure normal blocking-up, the conducting of controllable silicon light modulation or speed regulator, and reduce electrical piano power loss and raising Circuits System efficient that the afterflow compensation is produced.
3. the detection compensation method that is used for light modulation or speed-regulating control circuit according to claim 2, it is characterized in that: described detection controllable silicon light modulation or speed regulator exchange the method for cut operation output voltage size variation, it is the voltage swing that detects controllable silicon light modulation or speed regulator output by voltage detecting circuit, blocking state after judgement controllable silicon light modulation or the speed regulator AC-input voltage zero passage, produce controllable silicon light modulation or speed regulator and trigger compensating signal, and provide trigger current to controllable silicon light modulation or speed regulator by compensating circuit, make controllable silicon light modulation or the speed regulator can the triggered as normal conducting after the blocking-up of AC-input voltage zero passage.
4. the detection compensation method that is used for light modulation or speed-regulating control circuit according to claim 2, it is characterized in that: described detection controllable silicon light modulation or speed regulator exchange the method for cut operation output current size variation, it is the size of current that detects controllable silicon light modulation or speed regulator output by current detection circuit, keep electric current when judging controllable silicon light modulation or speed regulator triggering and conducting, and by compensating circuit electric current is kept in controllable silicon light modulation or speed regulator conducting dynamic compensation is provided, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally.
5. the detection compensation method that is used for light modulation or speed-regulating control circuit according to claim 2, it is characterized in that: the method for described power factor compensation and afterflow compensation is that operation equally loaded by power factor compensation circuit is at the importing electric current of AC power waveform in the cycle; By the afterflow compensating circuit to controllable silicon light modulation or speed regulator when load current reduces and can not satisfy conducting and keep the electric current needs, provide afterflow compensation to satisfy controllable silicon light modulation or the electric current demand is kept in the speed regulator conducting, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally, and the method that adopts power factor compensation and afterflow compensation to combine, with the power factor that improves light modulation or speed-regulating control circuit system, reduce the offset that electric current is kept in controllable silicon light modulation or speed regulator conducting, reach energy-conservation, purpose efficiently.
6. one kind by detecting light modulation or the speed-regulating control circuit that compensating circuit constitutes, it comprises controllable silicon light modulation or speed-regulating control circuit, it is characterized in that: the voltage detecting circuit generation in described controllable silicon light modulation or the speed-regulating control circuit exchanges the pulse signal that cut operation output size changes synchronously with controllable silicon light modulation or speed regulator, this pulse signal is converted to level signal by the benchmark change-over circuit, this level signal acts on Drive and Control Circuit simultaneously by output duty cycle control circuit and output current control circuit, realizes the compound control of load output duty cycle and loaded work piece electric current; Current detection circuit in described controllable silicon light modulation or the speed-regulating control circuit detects controllable silicon light modulation or speed regulator exchanges the size of current variation that the cut operation is exported, and produces the dynamic compensation control signal that controllable silicon light modulation or speed regulator are kept electric current; Power factor compensation in described controllable silicon light modulation or the speed-regulating control circuit and afterflow compensation combine, provide afterflow compensation to satisfy controllable silicon light modulation or required electric current is kept in the speed regulator conducting by the afterflow compensating circuit, make controllable silicon light modulation or speed regulator in turn-on cycle, keep normally.
7. the control method of light modulation or speed-regulating control circuit is characterized in that: with controllable silicon light modulation or speed regulator cut operation output size, Synchronization Control load output duty cycle and the size of loaded work piece electric current; With the method for load output duty cycle and the compound control of loaded work piece electric current, the power output of control load makes the power output adjustable range of load big, the adjustment process good linearity.
8. the control method of light modulation according to claim 7 or speed-regulating control circuit, it is characterized in that: the method for described load output duty cycle control, be interchange cut operation output by controllable silicon light modulation or speed regulator, by voltage detecting circuit, benchmark change-over circuit, output duty cycle control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with controllable silicon light modulation or speed regulator, Drive and Control Circuit drives output duty cycle according to this signal controlling.
9. the control method of light modulation according to claim 7 or speed-regulating control circuit, it is characterized in that: the control method of described loaded work piece electric current, be interchange cut operation output by controllable silicon light modulation or speed regulator, by voltage detecting circuit, benchmark change-over circuit, output current control circuit, produce a control signal that cut operation output size changes synchronously that exchanges with controllable silicon light modulation or speed regulator, Drive and Control Circuit drives output current according to this signal controlling.
10. light modulation or speed-regulating control circuit module is characterized in that: the module input pin be respectively voltage import detect pin, electric current imports and detects pin; The module output pin is respectively that afterflow compensation output connecting pin, power factor compensation drive pin, load output duty cycle and the compound control pin of loaded work piece electric current.
11. light modulation according to claim 10 or speed-regulating control circuit module is characterized in that: it is the input voltage sample circuit that voltage imports the peripheral circuit that detects the pin connection; It is the input current sample circuit that electric current imports the peripheral circuit that detects the pin connection; The peripheral circuit that is connected with controllable silicon afterflow compensation output connecting pin is the current drain circuit; The peripheral circuit that is connected with power factor compensation driving pin is a Boost DC-DC translation circuit; The peripheral circuit that is connected with the compound control pin of load output duty cycle and load current is a load driving circuits.
12. light modulation according to claim 10 or speed-regulating control circuit module is characterized in that: described module is provided with BoostDC-DC conversion output voltage feedback pin, AC synchronous pulse output connecting pin, control level input pin, load output current detection pin.
13. light modulation according to claim 12 or speed-regulating control circuit module is characterized in that: described Boost DC-DC conversion output voltage feedback pin is pfc circuit voltage control loop in module, and the loaded work piece voltage sample circuit outer with module is connected; Described AC synchronous pulse output connecting pin is to import the pulse-generating circuit that voltage detecting circuit forms in module, and the RC integrating circuit outer with module is connected; Described control level input pin is to connect output duty cycle control circuit and output current control circuit in module, and the RC integrating circuit output outer with module is connected; It is that output current control circuit and Drive and Control Circuit form the loaded work piece current regulator in module that described load output current detects pin, and the loaded work piece current sampling circuit outer with module is connected.
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| CN2010101930122A CN101868090B (en) | 2009-06-29 | 2010-05-27 | Circuit for dimming or speed regulation control and control method |
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| CN101646289A (en) | 2010-02-10 |
| CN101868090B (en) | 2013-04-24 |
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