CN214256117U - Wide-range voltage regulation control system - Google Patents
Wide-range voltage regulation control system Download PDFInfo
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- CN214256117U CN214256117U CN202120336269.2U CN202120336269U CN214256117U CN 214256117 U CN214256117 U CN 214256117U CN 202120336269 U CN202120336269 U CN 202120336269U CN 214256117 U CN214256117 U CN 214256117U
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Abstract
A wide-range voltage regulation control system comprises a high-voltage generator, a positive/negative high-voltage control circuit, an alternating current coupling 1/rectifying filter 1, an alternating current coupling 2/rectifying filter 2, a positive high-voltage regulation unit and a direct current component control unit; wherein, high-voltage transformer high-voltage winding among the high-voltage generator is connected with AC coupling 1/rectification filtering 1 and AC coupling 2/rectification filtering 2 respectively, and positive/negative high-voltage control circuit is connected with direct current component control unit and positive high-voltage regulating unit respectively, and AC coupling rectification filtering is connected with positive high-voltage regulating unit, and AC coupling rectification filtering is connected with direct current component control unit, and AC coupling rectification filtering is connected at positive/negative high-voltage output with positive high-voltage regulating unit, and positive/negative high-voltage output passes through voltage feedback circuit and is connected with positive/negative high-voltage control circuit, the utility model discloses can adjust the positive/negative high pressure that the output corresponds through the closed loop according to the instruction, it has output range width, the advantage such as load capacity is strong, the low-power consumption.
Description
Technical Field
The utility model relates to a laser printing control system specifically is a wide range pressure regulating control system.
Background
In laser printers and other devices, multiple independently adjustable high-voltage direct-current power supplies are generally required, and each high-voltage direct-current power supply is generated by one controlled electronic high-voltage generator, so that multiple independently controlled electronic high-voltage generators are required for meeting the requirement. The electronic high-voltage generator must use components with large volume and high cost such as a high-voltage transformer and a high-power transistor, and the multichannel independent adjustable high-voltage direct-current power supply formed by the plurality of independent high-voltage generators has the defects of complex structure, large volume and high cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wide range pressure regulating control system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a wide-range voltage regulation control system comprises a high-voltage generator, a positive/negative high-voltage control circuit, an alternating current coupling 1/rectifying filter 1, an alternating current coupling 2/rectifying filter 2, a positive high-voltage regulation unit and a direct current component control unit; the high-voltage winding of a high-voltage transformer in the high-voltage generator is respectively connected with an alternating current coupling 1/rectifying filter 1 and an alternating current coupling 2/rectifying filter 2, a positive/negative high-voltage control circuit is respectively connected with a direct current component control unit and a positive high-voltage regulating unit, the alternating current coupling rectifying filter is connected with the direct current component control unit, the alternating current coupling rectifying filter is connected with the positive high-voltage regulating unit at a positive/negative high-voltage output end, and the positive/negative high-voltage output end is connected with the positive/negative high-voltage control circuit through a voltage feedback circuit.
The alternating current coupling 1/rectifying filter 1 comprises 2 capacitors C1-1, C1-2, 2 diodes D1-1, D1-2, 1 resistor R1-1 and 1 voltage stabilizing diode ZD 1-1; one end of a capacitor C1-1 is connected with one end of a transformer output winding of a high-voltage generator, the other end of the capacitor C1-1 is connected with the cathode of a diode D1-1 and the anode of a diode D1-2, the anode of the diode D1-1 is grounded, the cathode of a diode D1-2 is connected with one end of a resistor R1-1, the other end of the resistor R1-1 is connected with the cathode of the capacitor C1-2 and the cathode of a voltage-stabilizing diode ZD1-1, the other end of the capacitor C1-2 is grounded, the anode of the voltage-stabilizing diode ZD1-1 is grounded, and the cathode of the voltage-stabilizing diode ZD1-1 is connected with the input of a positive high-voltage regulating unit.
The alternating current coupling 2/rectifying filter 2 comprises 3 capacitors C2-1, C2-2, C2-3, and 2 diodes D2-1 and D2-2; one end of a capacitor C2-1 is connected with one end of a transformer output winding of the high-voltage generator, the other end of the capacitor C2-1 is connected with the anode of a diode D2-1 and the cathode of a diode D2-2, the cathode of the diode D2-1 is connected with one end of a capacitor C2-2, the other end of the capacitor C2-2 is grounded, the anode of a diode D2-2 is connected with one end of a diode C2-3, the other end of the capacitor C2-3 is grounded, and the anode of the diode D2-2 is connected with a positive/negative high-voltage output end.
The positive high-voltage regulating unit comprises 1 voltage-stabilizing diode ZD1-2, 1 resistor R1-2, 1 photoelectric coupler U1-1, more than one PNP transistor Q3, more than one resistor R3, the cathode of a voltage-stabilizing diode ZD1-2 is connected with the output end of the positive and negative high-voltage control circuit, the anode of a voltage-stabilizing diode ZD1-2 is connected with one end of the resistor R1-2, the other end of the resistor R1-2 is connected with the anode of a diode of the photoelectric coupler U1-1, the cathode of a diode of the photoelectric coupler U1-1 is grounded, the collector of the photoelectric coupler is connected with an AC coupling rectifying and filtering circuit, the collector of the photoelectric coupler is connected with the emitter of a transistor Q3-1, the emitter of the photoelectric coupler is connected with the base of a transistor Q3-1, the collector of a transistor Q3-1 is connected with the emitter of a transistor Q3-2, the two ends of a resistor R3-1 are respectively connected with the bases of a transistor Q3-1 and a transistor Q3-2, the base electrode of the mth transistor is connected with one end of the (m-1) th resistor and one end of the mth electric group, the other end of the mth resistor is connected with the collector electrode of the mth transistor, the emitter electrode of the mth transistor is connected with the collector electrode of the (m-1) th transistor, and the collector electrode of the mth transistor is connected with the positive/negative high-voltage output end.
The direct current component control unit comprises 1 PNP transistor Q2-1, 1 NPN transistor Q2-2, 4 resistors R2-1, R2-2, R2-3 and R2-4, more than one PNP transistor Q4 and more than one resistor R4; one end of a resistor R2-1 is connected with the output end of the positive and negative high voltage control circuit, the base of a transistor Q2-1 at the other end of the resistor R2-1, one end of a resistor R2-2 is connected with a reference voltage + Vref, the other end of the resistor R2-2 is connected with the base of a transistor Q2-1, the emitter of a transistor Q2-1 is connected with the reference voltage + Vref, the collector of a transistor Q2-1 is connected with one end of a resistor R2-3, the other end of a resistor R2-3 is connected with the base of a transistor Q2-2, one end of a resistor R2-4 is connected with the base of the transistor Q2-2, the other end of a resistor R2-4 is grounded, the emitter of the transistor Q2-2 is grounded, the collector of the transistor Q2-2 is connected with the base of the transistor Q4-1, the emitter of the transistor Q4-1 is grounded, the collector of the transistor Q4-1 is connected with the emitter of the transistor Q4-2, one end of a resistor R4-1 is connected with the base of a transistor Q4-1, the other end of a resistor R4-1 is connected with the base of a transistor Q4-2, one end of a resistor R4-2 is connected with the base of a transistor Q4-2, one end of an mth resistor is connected with the cathode of a diode D2-1, the other end of the mth resistor is connected with the base of the mth transistor, the collector of the mth transistor is connected with the cathode of a diode D2-1, the emitter of the mth transistor is connected with the collector of the mth-1 transistor, the base of the mth transistor is connected with one end of the m-1 resistor, and the other end of the m-1 resistor is connected with the base of the m-1 transistor.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model can output corresponding positive/negative high voltage through closed loop regulation according to the instruction, and has the advantages of wide output range, strong load capacity, low power consumption and the like;
2. by utilizing the technical scheme provided by the utility model, a single high voltage generator can provide multi-path adjustable wide-range positive and negative high voltage;
3. the technical scheme has the advantages of high reliability, strong applicability, simple structure, low cost and easy implementation.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is an overall circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-2, in an embodiment of the present invention, a wide-range voltage regulation control system includes a high voltage generator, a positive/negative high voltage control circuit, an ac coupling 1/rectifying filter 1 (positive high voltage), an ac coupling 2/rectifying filter 2 (negative high voltage), a positive high voltage regulation unit, and a dc component control unit; the high-voltage winding of a high-voltage transformer in the high-voltage generator is respectively connected with an alternating-current coupling 1/rectifying filter 1 (positive high voltage) and an alternating-current coupling 2/rectifying filter 2 (negative high voltage), a positive/negative high-voltage control circuit is respectively connected with a direct-current component control unit and a positive high-voltage regulating unit, an alternating-current coupling rectifying filter (positive high voltage) is connected with the positive high-voltage regulating unit, an alternating-current coupling rectifying filter (negative high voltage) is connected with the direct-current component control unit, the alternating-current coupling rectifying filter (negative high voltage) is connected with the positive high-voltage regulating unit at a positive/negative high-voltage output end, and the positive/negative high-voltage output end is connected with the positive/negative high-voltage control circuit through a voltage feedback circuit.
The alternating current coupling 1/rectifying and filtering 1 (positive high voltage) circuit comprises 2 capacitors C1-1, C1-2, 2 diodes D1-1 and D1-2, 1 resistor R1-1 and 1 voltage stabilizing diode ZD 1-1; one end of a capacitor C1-1 is connected with one end of a transformer output winding of a high-voltage generator, the other end of the capacitor C1-1 is connected with the cathode of a diode D1-1 and the anode of a diode D1-2, the anode of the diode D1-1 is grounded, the cathode of a diode D1-2 is connected with one end of a resistor R1-1, the other end of the resistor R1-1 is connected with the cathode of the capacitor C1-2 and the cathode of a voltage-stabilizing diode ZD1-1, the other end of the capacitor C1-2 is grounded, the anode of the voltage-stabilizing diode ZD1-1 is grounded, and the cathode of the voltage-stabilizing diode ZD1-1 is connected with the input of a positive high-voltage regulating unit.
The alternating current coupling 2/rectifying filter 2 (negative high voltage) circuit comprises 3 capacitors C2-1, C2-2, C2-3, and 2 diodes D2-1 and D2-2; one end of a capacitor C2-1 is connected with one end of a transformer output winding of the high-voltage generator, the other end of the capacitor C2-1 is connected with the anode of a diode D2-1 and the cathode of a diode D2-2, the cathode of the diode D2-1 is connected with one end of a capacitor C2-2, the other end of the capacitor C2-2 is grounded, the anode of a diode D2-2 is connected with one end of a diode C2-3, the other end of the capacitor C2-3 is grounded, and the anode of the diode D2-2 is connected with a positive/negative high-voltage output end.
The positive high-voltage regulating unit comprises 1 voltage-stabilizing diode ZD1-2, 1 resistor R1-2, 1 photocoupler U1-1, m PNP transistors Q3-1, Q3-2 and … Q3-m (m is an integer greater than or equal to 1), m resistors R3-1, R3-2 and … R3-m (m is an integer greater than or equal to 1), the cathode of the voltage-stabilizing diode ZD1-2 is connected with the output end of the positive and negative high-voltage control circuit, the anode of the voltage-stabilizing diode ZD1-2 is connected with one end of the resistor R1-2, the other end of the resistor R1-2 is connected with the anode of the diode of the photocoupler U1-1, the cathode of the diode of the photocoupler U1-1 is grounded, the collector of the photocoupler is connected with an AC coupling rectifying and filtering (positive high-voltage) circuit, and the collector of the photocoupler is connected with the emitter of the transistor Q3-1, the emitter of the photoelectric coupler is connected with the base of a transistor Q3-1, the collector of a transistor Q3-1 is connected with the emitter of a transistor Q3-2, two ends of a resistor R3-1 are respectively connected with the bases of a transistor Q3-1 and a transistor Q3-2, the base of the mth transistor is connected with one end of the (m-1) th resistor and one end of the mth electric group, the other end of the mth resistor is connected with the collector of the mth transistor, the emitter of the mth transistor is connected with the collector of the (m-1) th transistor, and the collector of the mth transistor is connected with a positive/negative high-voltage output end.
The direct-current component control unit comprises 1 PNP transistor Q2-1, 1 NPN transistor Q2-2, 4 resistors R2-1, R2-2, R2-3, R2-4, m PNP transistors Q4-1, Q4-2, … Q4-m (m is an integer greater than or equal to 1), and m resistors R4-1, R4-2 and … R4-m (m is an integer greater than or equal to 1); one end of a resistor R2-1 is connected with the output end of the positive and negative high voltage control circuit, the base of a transistor Q2-1 at the other end of the resistor R2-1, one end of a resistor R2-2 is connected with a reference voltage + Vref, the other end of the resistor R2-2 is connected with the base of a transistor Q2-1, the emitter of a transistor Q2-1 is connected with the reference voltage + Vref, the collector of a transistor Q2-1 is connected with one end of a resistor R2-3, the other end of a resistor R2-3 is connected with the base of a transistor Q2-2, one end of a resistor R2-4 is connected with the base of the transistor Q2-2, the other end of a resistor R2-4 is grounded, the emitter of the transistor Q2-2 is grounded, the collector of the transistor Q2-2 is connected with the base of the transistor Q4-1, the emitter of the transistor Q4-1 is grounded, the collector of the transistor Q4-1 is connected with the emitter of the transistor Q4-2, one end of a resistor R4-1 is connected with the base of a transistor Q4-1, the other end of a resistor R4-1 is connected with the base of a transistor Q4-2, one end of a resistor R4-2 is connected with the base of a transistor Q4-2, one end of an mth resistor is connected with the cathode of a diode D2-1, the other end of the mth resistor is connected with the base of the mth transistor, the collector of the mth transistor is connected with the cathode of a diode D2-1, the emitter of the mth transistor is connected with the collector of the mth-1 transistor, the base of the mth transistor is connected with one end of the m-1 resistor, and the other end of the m-1 resistor is connected with the base of the m-1 transistor.
The control method of the control system comprises the following steps:
the method comprises the following steps: the high-voltage generator operates to generate a high voltage, the high-voltage winding of the high-voltage transformer respectively generates a positive high voltage and a negative high voltage through two alternating current couplings and rectification filtering, the voltage value of the generated positive high voltage is higher than the upper limit value of the output voltage regulation range of the wide-range positive and negative high-voltage regulation control system, and the voltage value of the negative high voltage is lower than the lower limit value of the output voltage regulation range of the wide-range positive and negative high-voltage regulation control system;
step two: a PWM voltage regulation instruction is sent from a positive/negative high-voltage instruction input end to preset output voltage;
step three: the positive/negative high-voltage control circuit simultaneously controls the positive high-voltage regulating unit and the direct-current component control unit according to the PWM voltage regulating instruction;
step four: the positive high-voltage regulating unit regulates a positive high-voltage value, and the direct-current component control unit regulates an alternating-current coupled direct-current component so as to regulate a negative high-voltage value;
step five: the positive/negative high-voltage control circuit samples the output voltage of the wide-range positive/negative high-voltage regulation control system, and confirms whether the positive/negative high-voltage output end reaches the preset output voltage or not through the sampled voltage to form a closed loop for regulation, so that the required positive/negative high voltage is obtained.
In practical implementation, the present application may also be extended to the following applications:
1. controlling the direct current component of the alternating current by using a direct current component control unit to obtain an adjustable high voltage;
2. an alternating current coupling 1/rectification filter 1 (positive high voltage) circuit can be deleted, the input end of a positive high voltage regulating unit is grounded, and zero voltage is regulated to negative high voltage;
3. an alternating current coupling 2/rectification filtering 2 (negative high voltage) circuit can be deleted, and the direct current component control unit is matched with the positive high voltage regulating unit to regulate zero voltage to positive high voltage;
4. the AC coupling adjustable high voltage is not limited to 2, and can be single or multiple.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A wide-range voltage regulation control system comprises a high-voltage generator, a positive/negative high-voltage control circuit, an alternating current coupling 1/rectifying filter 1, an alternating current coupling 2/rectifying filter 2, a positive high-voltage regulation unit and a direct current component control unit; the high-voltage generator is characterized in that a high-voltage winding of a high-voltage transformer in the high-voltage generator is respectively connected with an alternating current coupling 1/rectifying filter 1 and an alternating current coupling 2/rectifying filter 2, a positive/negative high-voltage control circuit is respectively connected with a direct current component control unit and a positive high-voltage regulating unit, the alternating current coupling rectifying filter is connected with the positive high-voltage regulating unit, the alternating current coupling rectifying filter is connected with the direct current component control unit, the alternating current coupling rectifying filter is connected with the positive high-voltage regulating unit at a positive/negative high-voltage output end, and the positive/negative high-voltage output end is connected with the positive/negative high-voltage control circuit through a voltage feedback circuit.
2. The wide-range voltage regulation control system according to claim 1, wherein the ac coupling 1/rectifying filter 1 comprises 2 capacitors C1-1, C1-2, 2 diodes D1-1, D1-2, 1 resistor R1-1, and 1 zener diode ZD 1-1; one end of a capacitor C1-1 is connected with one end of a transformer output winding of a high-voltage generator, the other end of the capacitor C1-1 is connected with the cathode of a diode D1-1 and the anode of a diode D1-2, the anode of the diode D1-1 is grounded, the cathode of a diode D1-2 is connected with one end of a resistor R1-1, the other end of the resistor R1-1 is connected with the cathode of the capacitor C1-2 and the cathode of a voltage-stabilizing diode ZD1-1, the other end of the capacitor C1-2 is grounded, the anode of the voltage-stabilizing diode ZD1-1 is grounded, and the cathode of the voltage-stabilizing diode ZD1-1 is connected with the input of a positive high-voltage regulating unit.
3. The wide-range voltage regulation control system of claim 1, wherein the ac coupling 2/rectifying filter 2 comprises 3 capacitors C2-1, C2-2, C2-3, 2 diodes D2-1 and D2-2; one end of a capacitor C2-1 is connected with one end of a transformer output winding of the high-voltage generator, the other end of the capacitor C2-1 is connected with the anode of a diode D2-1 and the cathode of a diode D2-2, the cathode of the diode D2-1 is connected with one end of a capacitor C2-2, the other end of the capacitor C2-2 is grounded, the anode of a diode D2-2 is connected with one end of a diode C2-3, the other end of the capacitor C2-3 is grounded, and the anode of the diode D2-2 is connected with a positive/negative high-voltage output end.
4. The wide-range voltage regulation control system of claim 1, wherein the positive high voltage regulation unit comprises 1 zener diode ZD1-2, 1 resistor R1-2, 1 photocoupler U1-1, more than one PNP transistor Q3, more than one resistor R3, zener diode ZD1-2 cathode connected to the positive and negative high voltage control circuit output, zener diode ZD1-2 anode connected to one end of resistor R1-2, the other end of resistor R1-2 connected to the diode anode of photocoupler U1-1, the diode cathode of photocoupler U1-1 grounded, the collector of photocoupler ac coupled to the rectifying and filtering circuit, the collector of photocoupler connected to the emitter of transistor Q3-1, the emitter of photocoupler connected to the base of transistor Q3-1, the collector of the transistor Q3-1 is connected with the emitter of the transistor Q3-2, two ends of the resistor R3-1 are respectively connected with the bases of the transistor Q3-1 and the transistor Q3-2, the base and the collector of the transistor are respectively connected with different resistors, the transistor and the resistor are arranged at intervals, and the transistor at the tail end is connected with the positive/negative high-voltage output end.
5. The wide-range voltage regulation control system of claim 1, wherein the dc component control unit comprises 1 PNP transistor Q2-1, 1 NPN transistor Q2-2, 4 resistors R2-1, R2-2, R2-3, R2-4, more than one PNP transistors Q4, more than one resistor R4; one end of a resistor R2-1 is connected with the output end of the positive and negative high voltage control circuit, the base of a transistor Q2-1 at the other end of the resistor R2-1, one end of a resistor R2-2 is connected with a reference voltage + Vref, the other end of the resistor R2-2 is connected with the base of a transistor Q2-1, the emitter of a transistor Q2-1 is connected with the reference voltage + Vref, the collector of a transistor Q2-1 is connected with one end of a resistor R2-3, the other end of a resistor R2-3 is connected with the base of a transistor Q2-2, one end of a resistor R2-4 is connected with the base of the transistor Q2-2, the other end of a resistor R2-4 is grounded, the emitter of the transistor Q2-2 is grounded, the collector of the transistor Q2-2 is connected with the base of the transistor Q4-1, the emitter of the transistor Q4-1 is grounded, the collector of the transistor Q4-1 is connected with the emitter of the transistor Q4-2, one end of the resistor R4-1 is connected with the base electrode of the transistor Q4-1, the other end of the resistor R4-1 is connected with the base electrode of the transistor Q4-2, one end of the resistor R4-2 is connected with the base electrode of the transistor Q4-2, one end of the resistor at the tail end is connected with the cathode of the diode D2-1, the other end of the resistor at the tail end is connected with the base electrode of the transistor at the tail end, the collector electrode of the transistor at the tail end is connected with the cathode electrode of the diode D2-1, the emitter electrode of the transistor at the tail end is connected with the collector electrode of the adjacent transistor at the front side, the base electrode of the transistor at the tail end is connected with one end of the adjacent resistor at the front side, and the other end of the resistor is connected with the base electrode of the adjacent transistor at the front side.
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| CN202120336269.2U CN214256117U (en) | 2021-02-05 | 2021-02-05 | Wide-range voltage regulation control system |
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| CN202120336269.2U CN214256117U (en) | 2021-02-05 | 2021-02-05 | Wide-range voltage regulation control system |
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