CN217522759U - Control circuit based on excitation power supply and sampling same port - Google Patents
Control circuit based on excitation power supply and sampling same port Download PDFInfo
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- CN217522759U CN217522759U CN202220893845.8U CN202220893845U CN217522759U CN 217522759 U CN217522759 U CN 217522759U CN 202220893845 U CN202220893845 U CN 202220893845U CN 217522759 U CN217522759 U CN 217522759U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a control circuit based on excitation power supply and sampling same port, which comprises an excitation winding power supply loop, a sampling loop and an excitation winding control loop; the main winding/main winding tap is respectively connected with the input ends of the excitation winding power supply loop and the sampling loop, and the output end of the excitation winding power supply loop is connected with the excitation winding; the output end of the sampling loop is connected with the excitation winding through the excitation winding control loop. By eliminating the auxiliary winding and the sampling winding wire of the dipolar motor and simultaneously supplying power to the excitation winding and the sampling resistor by the main winding, the connection structure of the voltage comparison unit and the motor is simplified, the production process difficulty of the motor is reduced, and the risk of short circuit and machine burning of the main winding and the auxiliary winding of the original motor is eliminated. The utility model discloses a photoelectric coupler for excitation winding supply circuit realizes the physics with the sampling return circuit and keeps apart, thereby makes the sampling circuit maintain the sampling proportion, has improved voltage comparison unit's stability.
Description
Technical Field
The utility model relates to a second grade generator technical field, in particular to control circuit based on excitation power supply and sampling are with port.
Background
At present, a general engine generator is a mature product and has a wide market, and a main winding, an auxiliary winding, a sampling winding and an excitation winding generally exist in the conventional secondary generator. The traditional voltage comparison unit needs to be connected with a motor secondary winding, a sampling winding and an excitation winding, the structure is relatively complex, the secondary winding and the sampling winding belong to independent windings in the motor part, and the secondary winding and the sampling winding are connected in the voltage comparison unit. For example, a secondary motor used in the current market adopts a secondary winding as a voltage comparison unit for excitation power supply, and adopts a main winding or a main winding tap as sampling.
Magnetic interference exists between the main winding and the auxiliary winding, the waveform distortion rate of the main winding is usually more than 20%, and the sampling accuracy of the voltage comparison unit is influenced, so that the voltage precision of the generator is influenced; and voltage difference (more than 100V) exists between the windings, voltage breakdown can be caused by improper insulation treatment, and short circuit can occur in serious conditions to burn out the motor and the voltage comparison unit.
SUMMERY OF THE UTILITY MODEL
The lower problem of generator output voltage precision among the prior art, the utility model provides a based on excitation power supply and sampling are with control circuit of port, through the secondary winding and the sampling winding line of cancellation dipolar motor, use main winding or main winding to take a percentage and provide excitation power supply and voltage comparing unit sampling signal simultaneously, eliminated the magnetic interference of main winding and secondary winding, improved motor output waveform quality and then improved voltage comparing unit sampling precision, make the improvement of generator output voltage precision. Meanwhile, the possibility of short circuit burning of the main winding and the auxiliary winding is eliminated, and the connection of the voltage comparison unit and a generator system is simplified.
In order to achieve the above object, the present invention provides the following technical solutions:
a control circuit based on excitation power supply and sampling same port comprises an excitation winding power supply loop, a sampling loop and an excitation winding control loop;
the main winding/main winding tap is respectively connected with the input ends of the excitation winding power supply loop and the sampling loop, and the output end of the excitation winding power supply loop is connected with the excitation winding; the output end of the sampling loop is connected with the excitation winding through the excitation winding control loop.
Preferably, the field winding supply loop comprises a main winding/main winding tap and a field winding:
one end of a main winding/main winding tap is respectively connected with one end of a first resistor and the 4 th end of a first rectifier bridge, and the other end of the first resistor is respectively connected with one end of a second resistor and the 4 th end of the second rectifier bridge; the 1 st end of the first rectifier bridge is connected with one end of the first capacitor in parallel and then grounded; and the 3 rd end of the first rectifier bridge, the other end of the first capacitor, one end of the fifth resistor, one end of the eighth resistor and the negative electrode of the second diode are connected in parallel and then connected with the excitation winding.
Preferably, the sampling loop comprises a main winding/main winding tap and a voltage comparison unit:
the other end of the main winding/main winding tap is respectively connected with the other end of the second resistor, the 2 nd end of the first rectifier bridge and the 2 nd end of the second rectifier bridge; the 3 rd end of the second rectifier bridge is connected with one end of a third resistor, the other end of the third resistor is connected with the input end of a voltage comparison unit, the 1 st end of the second rectifier bridge is connected with the grounding end of the voltage comparison unit in parallel and then grounded, the reference end of the voltage comparison unit is respectively connected with a reference voltage Vcc and one end of a fourth resistor, and the output end of the voltage comparison unit and the other end of the fourth resistor are connected with the input end of an excitation winding control loop in parallel and then connected with the output end of the voltage comparison unit.
Preferably, the excitation winding control loop comprises a photoelectric coupler, a triode and a field effect transistor:
the output end of the voltage comparison unit is connected with the cathode of the input end of the photoelectric coupler, and the other end of the fourth resistor is connected with the anode of the input end of the photoelectric coupler; a collector of the output end of the photoelectric coupler is connected with the anode of the first diode, one end of the sixth resistor and one end of the seventh resistor respectively, and the cathode of the first diode is connected with the other end of the fifth resistor; the other end of the seventh resistor is connected with the base electrode of the triode, the collector electrode of the triode is respectively connected with the other end of the eighth resistor and one end of the ninth resistor, the other end of the ninth resistor is connected with the grid electrode of the field-effect tube, and the drain electrode of the field-effect tube is respectively connected with the anode of the second diode and the excitation winding; and an emitting electrode at the output end of the photoelectric coupler, the other end of the sixth resistor, an emitting electrode of the triode and a source electrode of the field effect tube are connected in parallel and then grounded.
Preferably, the first resistor and the second resistor are step-down resistors.
Preferably, the photocoupler is used for physically isolating the excitation winding power supply loop and the sampling loop.
To sum up, owing to adopted above-mentioned technical scheme, compare with prior art, the utility model discloses following beneficial effect has at least:
the utility model discloses a cancellation dipolar motor's secondary winding and sampling winding wire use main winding or main winding to take a percentage and provide excitation power and voltage comparison unit sampling signal simultaneously, have eliminated the magnetic interference of main winding and secondary winding, have improved the motor output waveform quality and then improved voltage comparison unit sampling precision, make generator output voltage precision improve, have eliminated the possibility that main and secondary winding short circuit burns out simultaneously, have simplified voltage comparison unit and generator system connection.
The utility model discloses a photoelectric coupler for excitation winding supply circuit realizes the physics with the sampling return circuit and keeps apart, thereby makes the sampling circuit maintain the sampling proportion, has improved voltage comparison unit's stability.
Description of the drawings:
fig. 1 is a circuit diagram of a voltage comparison unit according to a conventional two-pole motor.
Fig. 2 is a schematic diagram of a control circuit based on excitation power supply and sampling same port according to an exemplary embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and specific embodiments. However, it should not be understood that the scope of the above subject matter is limited to the following embodiments, and all the technologies realized based on the content of the present invention are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected" and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and those skilled in the art may understand the specific meanings of the above terms according to specific situations.
Fig. 1 is a conventional voltage comparison unit circuit for a two-pole motor, which includes a secondary winding, a sampling winding, an excitation winding, and a voltage comparison unit:
the positive electrode of the secondary winding is connected with the 1 st end of a third rectifier bridge BG3, the negative electrode of the secondary winding is connected with the 3 rd end of a third rectifier bridge BG3, the 2 nd end of the third rectifier bridge BG3 is connected with one end of a third capacitor C3 in parallel and then grounded, and the 4 th end of the third rectifier bridge BG3, the other end of the third capacitor C3 and one end of a sixteenth resistor R16 are connected with the positive electrode of the excitation winding in parallel and then connected with the positive electrode of the excitation winding; i.e. the supply of the field winding is derived from the secondary winding.
The positive pole of a sampling winding (a tap taken from the main winding) is connected with the 4 th end of a fourth rectifier bridge BG4, the negative pole of the sampling winding is connected with the 2 nd end of a fourth rectifier bridge BG4, the 3 rd end of the fourth rectifier bridge BG4 is respectively connected with a power supply VCC and one end of an eleventh resistor R11, the other end of the eleventh resistor R11 is respectively connected with one end of a twelfth resistor R12 and one end of a thirteenth resistor R13, the other end of the twelfth resistor R12 is connected with one end of a fourth capacitor C4, the other end of a thirteenth resistor R13 is connected with one end of a fourteenth resistor R14, the other end of the fourteenth resistor R14 is connected with one end of a fifteenth resistor R15, the other end of a fifteenth resistor R15 and the other end of a fourth capacitor C4 are connected in parallel and then the 1 st end of the fourth rectifier bridge BG4 is connected, and the adjusting end of the fourteenth resistor R14 is connected with the first end of a voltage comparison unit; i.e. the supply of the sampling winding is derived from the main winding.
The other end of the sixteenth resistor R16 is connected with the cathode of the second diode D2, the anode of the second diode D2 is connected with one end of a seventeenth resistor R17, and the other end of the seventeenth resistor R17, the second end of the voltage comparison unit and the cathode of the excitation winding are connected in parallel and then grounded.
In the embodiment, the main winding and the secondary winding are two voltage sources, and the common ground connection at the voltage comparison unit causes the short circuit and burn-in risk of the motor.
Therefore, in the embodiment, a control circuit based on the same port for excitation power supply and sampling is provided, the secondary winding and the sampling winding of the two-pole motor are eliminated, the output end of the main winding supplies power for the excitation winding, and the tap end of the main winding (namely, a wire is taken out from the middle of the main winding and connected with the sampling circuit) supplies power for the sampling resistor, so that the connection structure of the motor is simplified, the difficulty of the production process of the motor is reduced, and the risk of short circuit and machine burning of the primary and secondary windings of the original motor is eliminated;
as shown in fig. 2, a control circuit based on the same port for excitation power supply and sampling includes an excitation winding power supply loop, a sampling loop, and an excitation winding control loop.
The tap of the main winding or the tap of the main winding is respectively connected with the input end of the excitation winding power supply loop and the input end of the sampling loop; the output end of the sampling loop is connected with the input end of the excitation winding control loop, and the output end of the excitation winding control loop is connected with the excitation winding so as to control the excitation intensity of the excitation winding; the output end of the excitation winding power supply loop is connected with the excitation winding (as power supply), and the output end of the excitation winding control loop is connected with the excitation winding so as to control the excitation intensity of the excitation winding.
In this embodiment, the excitation winding power supply circuit includes a main winding and an excitation winding:
one end of the main winding or the tap of the main winding is respectively connected with one end of a first resistor R1 and the 4 th end of a first rectifier bridge DB1, and the other end of the first resistor R1 is respectively connected with one end of a second resistor R2 and the 4 th end of a second rectifier bridge DB 2; the 1 st end of the first rectifier bridge DB1 is connected in parallel with one end of the first capacitor C1 and then grounded (PGND); the 3 rd end of the first rectifier bridge DB1, the other end of the first capacitor C1, one end of the fifth resistor R5, one end of the eighth resistor R8 and the negative electrode of the second diode D2 are connected in parallel and then connected with one end of the excitation winding; i.e. the supply of the excitation winding and the main winding or the main winding taps.
In this embodiment, the first resistor R1 and the second resistor R2 function as a voltage drop.
In this embodiment, the sampling loop includes a main winding and a voltage comparing unit (the existing voltage comparing unit is not a key point of the present invention, and therefore is not described herein):
the other end of the main winding or the main winding tap is respectively connected with the other end of the second resistor R2, the 2 nd end of the first rectifier bridge DB1 and the 2 nd end of the second rectifier bridge DB 2; the 3 rd end of the second rectifier bridge DB2 is connected to one end of a third resistor R3, the other end of the third resistor R3 is connected to the input end of the voltage comparison unit, the 1 st end of the second rectifier bridge DB2 is connected in parallel to the ground end of the voltage comparison unit and then grounded (AGND), the reference end of the voltage comparison unit is connected to the reference voltage Vcc and one end of a fourth resistor R4, respectively, and the output end of the voltage comparison unit and the other end of the fourth resistor R4 are connected in parallel and then connected to the input end of the excitation winding control loop.
In this embodiment, the excitation winding control loop includes a photocoupler PH1, a triode Q1, and a field effect transistor Q2:
the output end of the voltage comparison unit is connected with the cathode of the input end of a photoelectric coupler PH1, and the other end of the fourth resistor R4 is connected with the anode of the input end of the photoelectric coupler PH 1; a collector of the output end of the photoelectric coupler PH1 is respectively connected with the anode of the first diode D1, one end of the sixth resistor R6 and one end of the seventh resistor R7, and the cathode of the first diode D1 is connected with the other end of the fifth resistor R5; the other end of the seventh resistor R7 is connected with the base of a triode Q1, the collector of the triode Q1 is respectively connected with the other end of the eighth resistor R8 and one end of a ninth resistor R9, the other end of the ninth resistor R9 is connected with the gate of a field-effect tube Q2, and the drain of the field-effect tube Q2 is respectively connected with the anode of the second diode D2 and the other end of the excitation winding; an emitter of the output end of the photoelectric coupler PH1, the other end of the sixth resistor R6, an emitter of the triode Q1 and a source of the field-effect transistor Q2 are connected in parallel and then grounded (PGND).
In this embodiment, the reference voltage Vcc includes, but is not limited to, the following two sources: the voltage stabilizing circuit is directly obtained from the main winding or the tap rectification voltage stabilization of the main winding, and is obtained from the sampling circuit rectification voltage stabilization.
In this embodiment, due to the use of the photoelectric coupler PH1, the power supply loop and the sampling loop of the excitation winding are isolated, so that the sampling circuit maintains the sampling ratio, and the stability of the voltage comparison unit is improved.
In this embodiment, the voltage comparison unit compares the sampling signal voltage of the sampling circuit with the reference voltage VCC, and then feeds back the logic potential signal to the photoelectric coupler, so as to improve the excitation strength of the motor excitation winding by driving the on/off conditions of the triode Q1 and the field effect transistor Q2, thereby realizing the control of the voltage output of the generator.
In the embodiment, because the excitation power supply and the sampling of the secondary motor voltage comparison unit are realized by the same port (both the secondary motor voltage comparison unit is arranged on the main winding or a tap of the main winding), and the secondary winding is eliminated, the connection of the voltage comparison unit and the generator is simplified in structure, the magnetic interference of the main winding and the secondary winding is eliminated from a magnetic circuit, the generator obtains power output with higher waveform quality, the voltage withstanding problem of the main winding and the secondary winding of the traditional motor is eliminated, and the possibility of motor and circuit damage caused by the short circuit of the main winding and the secondary winding is avoided.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention and that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. A control circuit based on excitation power supply and sampling same port is characterized by comprising an excitation winding power supply loop, a sampling loop and an excitation winding control loop;
the main winding/main winding tap is respectively connected with the input ends of the excitation winding power supply loop and the sampling loop, and the output end of the excitation winding power supply loop is connected with the excitation winding; the output end of the sampling loop is connected with the excitation winding through the excitation winding control loop.
2. The excitation-power-and-sampling-co-port-based control circuit as claimed in claim 1, wherein the excitation winding power supply loop comprises a main winding/main winding tap and an excitation winding:
one end of a main winding/main winding tap is respectively connected with one end of a first resistor and the 4 th end of a first rectifier bridge, and the other end of the first resistor is respectively connected with one end of a second resistor and the 4 th end of the second rectifier bridge; the 1 st end of the first rectifier bridge is connected with one end of the first capacitor in parallel and then grounded; and the 3 rd end of the first rectifier bridge, the other end of the first capacitor, one end of the fifth resistor, one end of the eighth resistor and the negative electrode of the second diode are connected in parallel and then connected with the excitation winding.
3. The control circuit based on the excitation power supply and sampling same port as the claim 1, wherein the sampling loop comprises a main winding/main winding tap and voltage comparison unit:
the other end of the main winding/main winding tap is respectively connected with the other end of the second resistor, the 2 nd end of the first rectifier bridge and the 2 nd end of the second rectifier bridge; the 3 rd end of the second rectifier bridge is connected with one end of a third resistor, the other end of the third resistor is connected with the input end of a voltage comparison unit, the 1 st end of the second rectifier bridge is connected with the grounding end of the voltage comparison unit in parallel and then grounded, the reference end of the voltage comparison unit is respectively connected with a reference voltage Vcc and one end of a fourth resistor, and the output end of the voltage comparison unit and the other end of the fourth resistor are connected with the input end of an excitation winding control loop in parallel and then connected with the input end of the excitation winding control loop.
4. The control circuit based on the excitation power supply and sampling common port as claimed in claim 1, wherein the excitation winding control loop comprises a photocoupler, a triode, a field effect transistor:
the output end of the voltage comparison unit is connected with the cathode of the input end of the photoelectric coupler, and the other end of the fourth resistor is connected with the anode of the input end of the photoelectric coupler; a collector of the output end of the photoelectric coupler is respectively connected with the anode of the first diode, one end of the sixth resistor and one end of the seventh resistor, and the cathode of the first diode is connected with the other end of the fifth resistor; the other end of the seventh resistor is connected with the base electrode of the triode, the collector electrode of the triode is respectively connected with the other end of the eighth resistor and one end of the ninth resistor, the other end of the ninth resistor is connected with the grid electrode of the field-effect tube, and the drain electrode of the field-effect tube is respectively connected with the anode of the second diode and the excitation winding; and an emitter at the output end of the photoelectric coupler, the other end of the sixth resistor, an emitter of the triode and a source of the field effect transistor are connected in parallel and then grounded.
5. The control circuit based on the excitation power supply and sampling same port as the claim 2, characterized in that, the first resistor and the second resistor are voltage reduction resistors.
6. The excitation power supply and sampling same port-based control circuit as claimed in claim 4, wherein said optocoupler is used to physically isolate the excitation winding power supply loop from the sampling loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220893845.8U CN217522759U (en) | 2022-04-18 | 2022-04-18 | Control circuit based on excitation power supply and sampling same port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220893845.8U CN217522759U (en) | 2022-04-18 | 2022-04-18 | Control circuit based on excitation power supply and sampling same port |
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| Publication Number | Publication Date |
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| CN217522759U true CN217522759U (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220893845.8U Active CN217522759U (en) | 2022-04-18 | 2022-04-18 | Control circuit based on excitation power supply and sampling same port |
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| CN (1) | CN217522759U (en) |
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- 2022-04-18 CN CN202220893845.8U patent/CN217522759U/en active Active
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