CN111751723B - Device for simulating output signal of rotary transformer and providing fault diagnosis - Google Patents
Device for simulating output signal of rotary transformer and providing fault diagnosis Download PDFInfo
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- CN111751723B CN111751723B CN202010584486.3A CN202010584486A CN111751723B CN 111751723 B CN111751723 B CN 111751723B CN 202010584486 A CN202010584486 A CN 202010584486A CN 111751723 B CN111751723 B CN 111751723B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
Abstract
The invention discloses a device for simulating output signals of a rotary transformer and providing fault diagnosis, which relates to the field of motor position acquisition sensors and comprises a rotary transformer static angle simulation subsystem, a rotary transformer steady-state rotating speed simulation subsystem, an excitation winding signal overrun detection subsystem, a feedback winding fault simulation subsystem, a main power supply and an auxiliary power supply which are mutually coupled, wherein the excitation winding signal overrun detection subsystem can identify faults that the amplitude of an excitation signal exceeds a normal value, the protection mechanism is to cut off the power supply of the main power supply of the system, automatically stop the work of the simulation system and warn through a work indicator lamp, and the feedback winding fault simulation subsystem can simulate short-circuit and open-circuit faults of 2 paths of feedback windings. The functions of integrating and simulating the rotary transformer output signal and diagnosing the fault are realized, and the size is reduced.
Description
Technical Field
The invention relates to the field of motor position acquisition sensors, in particular to a device for simulating an output signal of a rotary transformer and providing fault diagnosis.
Background
A sine and cosine resolver (hereinafter referred to as resolver) is a sensor for measuring angles, converts a rotor rotation angle into a voltage signal presenting a sine and cosine functional relationship with the rotor rotation angle, and consists of a primary winding (excitation winding) and two secondary windings (sine and cosine feedback windings). At present, the rotary transformer is widely used as a motor position sensor, and in some application occasions where corresponding positions and rotating speed signals of a rotor need to be analyzed according to given rotary transformer output signals, the scheme is that the rotary transformer is installed on an adjustable motor to directly generate required signals or complex electronic devices such as a signal generating instrument and a microprocessor are used for simulating the required signals.
However, the scheme lacks a resolver signal fault diagnosis function, and is large in size, high in cost and large in space requirement and regular in maintenance.
Disclosure of Invention
The invention aims to provide a device for simulating an output signal of a rotary transformer and providing fault diagnosis, wherein an excitation winding signal overrun detection subsystem is arranged to identify faults that the amplitude of an excitation signal exceeds a normal value, a protection mechanism is to cut off the power supply of a main power supply of a system, automatically stop the work of a simulation system and warn through a work indicator lamp, and a feedback winding fault simulation subsystem can simulate short-circuit and open-circuit faults of 2 paths of feedback windings. The functions of integrating and simulating the rotary transformer output signal and fault diagnosis are realized, and the size is reduced.
A device for simulating the output signal of a rotary transformer and providing fault diagnosis comprises a rotary transformer static angle simulation subsystem, a rotary transformer steady-state rotating speed simulation subsystem, an excitation winding signal overrun detection subsystem, a feedback winding fault simulation subsystem, a main power supply and an auxiliary power supply which are mutually coupled;
the rotary-change static angle simulation subsystem comprises a feedback winding carrier signal generation circuit C 1 And sine and cosine feedback winding signal generating circuit C 2 Said feedback winding carrier signal generating circuit C 1 The input end of the transformer is connected with an electromagnetic winding, and the output end of the transformer is connected with a sine and cosine feedback winding signal generating circuit C 2 The sine and cosine feedback winding signal generating circuit C 2 The output end of the transformer is connected with the feedback winding of the subsystem;
the rotational-change steady-state rotating speed simulation subsystem comprises a sine signal generation circuit C 3 And an integrating circuit C 4 A first multiplier circuit C 5 And a second multiplier circuit C 6 Said sinusoidal signal generating circuit C 3 And integrating circuit C 4 Connected to said first multiplier circuit C 5 Is connected with the generating circuit C 3 And feedback winding carrier signal U 2 Generating circuit C 1 The output end of the second multiplier circuit is connected with a cosine feedback winding of the subsystem, and the second multiplier circuit C 6 Input terminalConnecting integrating circuit C 4 And feedback winding carrier signal generating circuit C 1 The output end of the transformer is connected with a sinusoidal feedback winding of the subsystem;
the excitation winding signal overrun detection subsystem comprises a first comparator circuit C 7 A second comparator circuit C 8 Main power supply automatic cut-off circuit C 9 And a main power supply voltage indicator circuit C 10 Said first comparator circuit C 7 Is input with the excitation winding signal and the maximum judgment threshold value V max CM whose output end is connected with main power supply automatic cut-off circuit C 9 Said second comparator circuit C 8 Is input with the excitation winding signal and the minimum judgment threshold value V min CM whose output end is connected with main power supply automatic cut-off circuit C 9 The main power supply automatic cut-off circuit C 9 And a main power supply voltage indicator circuit C 10 Connecting;
the feedback winding fault simulation subsystem comprises a first relay control circuit C 11 And a second relay control circuit C 12 And a third relay control circuit C 13 The first relay control circuit C 11 The second relay control circuit C is used for controlling 2 paths of feedback winding analog signals to be switched between 2 modes of static angle and steady-state rotating speed 12 The function is to simulate the open circuit fault of the 2-path feedback winding, and the third relay control circuit C 13 The effect is to simulate a 2-way feedback winding short-circuit fault.
Preferably, the feedback winding carrier signal generating circuit C 1 For differential amplifying circuit, the input is excitation winding signal U 1 The amplification factor is a rotary variable fixed transformation ratio k, and the output signal U 2 The sine and cosine feedback winding signal generating circuit C 2 For in-phase amplifying circuits, the input is the signal U 2 The amplification factor is
The output signal is the sine and cosine feedback winding signal.
Preferably, the sine signal generating circuit C 3 The output is sine tone for sine wave generating circuitSignal U 5 Said integrating circuit C 4 For integrating circuits, the input is a sinusoidal modulation signal U 5 The output is a cosine modulated signal U 6 Said first multiplier circuit C 5 The input being a carrier signal U 2 The output is a cosine modulated signal U 6 Said second multiplier circuit C 6 The input being a carrier signal U 2 And a sinusoidal modulation signal U 5 The output is a sinusoidal feedback winding signal U 3 。
Preferably, the first comparator circuit C 7 And a second comparator circuit C 8 Is the excitation winding signal U 1 When exciting winding signal U 1 When the voltage is within the judgment threshold range, the output is at a high level and is in a normal state, and when the voltage is not within the judgment threshold range, the output is at a low level and is in a fault state.
Preferably, the main power supply automatic shutoff circuit C 9 A main power supply automatic cut-off circuit C for the relay control circuit when judging the fault state 9 Cutting off the power supply of the main power supply, wherein the voltage of the main power supply indicates a lamp circuit C 10 And an indicator light T0 is connected, and the indicator light T0 is connected between the positive pole and the negative pole of the main power supply in parallel and is arranged on the surface of the device shell.
Preferably, the judgment threshold can be adjusted according to different simulation requirements.
Preferably, the rotation-variation static angle simulation subsystem selects 45 degrees as the simulation angle.
Preferably, the main power supply and the auxiliary power supply are both supplied by 220V power frequency alternating current, the output of the main power supply is 15V direct current, and the output of the auxiliary power supply is 5V direct current.
Preferably, the auxiliary power supply is a main power supply automatic cut-off circuit C 9 The auxiliary power supply is a first relay control circuit C 11 And a second relay control circuit C 12 And a third relay control circuit C 13 And (5) supplying power.
The invention has the advantages that: the excitation winding signal overrun detection subsystem is arranged to identify the fault that the excitation signal amplitude exceeds a normal value, the protection mechanism is to cut off the main power supply of the system, automatically stop the simulation system to work and warn through a working indicator lamp, and the feedback winding fault simulation subsystem can simulate the short circuit and open circuit faults of 2 paths of feedback windings. The functions of integrating and simulating the rotary transformer output signal and fault diagnosis are realized, and the size is reduced.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of a process flow of the present invention;
FIG. 3 is a schematic diagram of a rotary-to-static angle simulation subsystem of the present invention;
FIG. 4 is a schematic diagram of a rotational variation steady state rotational speed simulation subsystem of the present invention;
FIG. 5 is a schematic diagram of an excitation winding signal overrun detection subsystem of the present invention;
FIG. 6 is a schematic diagram of a feedback winding fault simulation subsystem of the present invention;
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments.
As shown in fig. 1 to 6, an apparatus for simulating output signals of a resolver and providing fault diagnosis includes a resolver static angle simulation subsystem, a resolver steady-state rotation speed simulation subsystem, an excitation winding signal overrun detection subsystem, a feedback winding fault simulation subsystem, a main power supply and an auxiliary power supply, which are coupled to each other;
the rotary-change static angle simulation subsystem comprises a feedback winding carrier signal generation circuit C 1 And sine and cosine feedback winding signal generating circuit C 2 Said feedback winding carrier signal generating circuit C 1 The input end of the transformer is connected with an electromagnetic winding, and the output end of the transformer is connected with a sine and cosine feedback winding signal generating circuit C 2 The sine and cosine feedback winding signal generating circuit C 2 The output end of the transformer is connected with the feedback winding of the subsystem;
the rotational-change steady-state rotating speed simulation subsystem comprises a sine signal generation circuit C 3 Integrating electricityWay C 4 A first multiplier circuit C 5 And a second multiplier circuit C 6 Said sinusoidal signal generating circuit C 3 And integrating circuit C 4 Connected to said first multiplier circuit C 5 Is connected with the generating circuit C 3 And feedback winding carrier signal U 2 Generating circuit C 1 The output end of the second multiplier circuit is connected with a cosine feedback winding of the subsystem, and the second multiplier circuit C 6 The input end is connected with an integrating circuit C 4 And feedback winding carrier signal generating circuit C 1 The output end of the transformer is connected with a sinusoidal feedback winding of the subsystem;
the excitation winding signal overrun detection subsystem comprises a first comparator circuit C 7 A second comparator circuit C 8 Main power supply automatic cut-off circuit C 9 And a main power supply voltage indicator circuit C 10 Said first comparator circuit C 7 Is input with the excitation winding signal and the maximum judgment threshold value V max CM whose output end is connected with main power supply automatic cut-off circuit C 9 Said second comparator circuit C 8 The input of is the excitation winding signal and the minimum judgment threshold value V min CM whose output end is connected with main power supply automatic cut-off circuit C 9 The main power supply automatic cut-off circuit C 9 And a main power supply voltage indicator circuit C 10 Connecting;
the feedback winding fault simulation subsystem comprises a first relay control circuit C 11 And a second relay control circuit C 12 And a third relay control circuit C 13 The first relay control circuit C 11 The second relay control circuit C is used for controlling 2 paths of feedback winding analog signals to be switched between 2 modes of static angle and steady-state rotating speed 12 The function is to simulate the open circuit fault of the 2-path feedback winding, and the third relay control circuit C 13 The effect is to simulate a 2-way feedback winding short-circuit fault.
The feedback winding carrier signal generating circuit C 1 For differential amplifying circuit, the input is excitation winding signal U 1 The amplification factor is a rotary variable fixed transformation ratio k, and a signal U is output 2 Said sine and cosine feedback windingGroup signal generating circuit C 2 For in-phase amplifying circuits, the input is the signal U 2 The amplification factor is
The output signal is the sine-cosine feedback winding signal.
The sine signal generating circuit C 3 Is a sine wave generating circuit, and the output is a sine modulation signal U 5 Said integration circuit C 4 For integrating circuits, the input is a sinusoidal modulation signal U 5 The output is a cosine modulated signal U 6 Said first multiplier circuit C 5 The input being a carrier signal U 2 The output is a cosine modulated signal U 6 Said second multiplier circuit C 6 The input being a carrier signal U 2 And a sinusoidal modulation signal U 5 The output is a sinusoidal feedback winding signal U 3 。
The first comparator circuit C 7 And a second comparator circuit C 8 Is the excitation winding signal U 1 When exciting winding signal U 1 When the voltage is within the judgment threshold range, the output is at a high level and is in a normal state, and when the voltage is not within the judgment threshold range, the output is at a low level and is in a fault state.
The main power supply automatic cut-off circuit C 9 A main power supply automatic cut-off circuit C for the relay control circuit when the relay control circuit is judged to be in a fault state 9 Cutting off the power supply of the main power supply, wherein the voltage of the main power supply indicates a lamp circuit C 10 And the indicator light T0 is connected, and the indicator light T0 is connected between the positive pole and the negative pole of the main power supply in parallel and is arranged on the surface of the shell of the device.
The judgment threshold value can be adjusted according to different simulation requirements.
And the rotary-change static angle simulation subsystem selects 45 degrees as a simulation angle.
The main power supply and the auxiliary power supply are both supplied by 220V power frequency alternating current, the output of the main power supply is 15V direct current, and the output of the auxiliary power supply is 5V direct current.
The auxiliary power supply is a main power supply automatic cut-off circuit C 9 Assistance ofThe power supply is a first relay control circuit C 11 And a second relay control circuit C 12 And a third relay control circuit C 13 And (5) supplying power.
The specific implementation mode and principle are as follows:
rotary-change excitation winding signal U 1 = a sin ω t, carrier signal U of feedback winding voltage 2 K x a sin ω t, sinusoidal feedback winding signal U 3 K, a, ω t, sin θ, cosine feedback winding signal U 4 K × a × sin ω t × cos θ. Where a is the amplitude of the excitation voltage, ω is the angular frequency of the excitation voltage, k is the transformation ratio of the rotation, and θ is the rotor rotation angle of the rotation.
The design defines that excitation signal winding signals are R1 and R2, cosine feedback winding signals are S1 and S3, sine feedback winding signals are S2 and S4, and S3 and S4 are grounded.
By the rotary-variable static angle simulation subsystem shown in fig. 3, in order to simplify the design scheme, the simulation rotation angle of the design is 45 degrees, and then the sinusoidal feedback winding signal
Cosine feedback winding signal
The sine and cosine feedback winding signals are the same, and the amplitude is the feedback winding carrier signal U 2 Is/are as follows
And (4) doubling. The subsystem thus includes a feedback winding carrier signal U 2 Generating circuit C 1 And sine and cosine feedback winding signal generating circuit C 2 ；
Circuit C 1 Designed as a differential amplifying circuit, the input of which is an excitation winding signal U 1 The amplification factor is a rotary variable fixed transformation ratio k, the output is a signal U 2 . The circuit can simulate rotary transformer products with different transformation ratios, and has flexibility in design. Circuit C 2 Designed as in-phase amplifying circuit, the input of which is a signal U 2 The amplification factor is
The output signal is the sine and cosine feedback winding signal at a 45 deg. angle of rotation.
From the rotational-to-steady-state rotational speed simulation subsystem shown in FIG. 4, slave U 3 、U 4 As can be seen from the formula, the sinusoidal feedback winding signals are respectively composed of carrier signals U 2 And a sinusoidal modulation signal U 5 The cosine feedback winding signals are respectively obtained by multiplying carrier signals U 2 And cosine modulated signal U 6 And multiplying the two to obtain the product. Wherein U is 5 、U 6 The frequency and amplitude of the signal are equal, the frequency is determined by the angular speed of the rotary variable rotor to be simulated, and the amplitude is divided by the amplitude of the voltage of the feedback winding to be simulated and the carrier signal U 2 The amplitude is obtained. The subsystem thus comprises 1 sinusoidal signal generating circuit C 3 1 integrating circuit C 4 And 2 multiplier circuits C 5 、C 6 Forming;
circuit C 3 Designed as a sine wave generating circuit, the output of which is a sine modulation signal U 5 The frequency can be flexibly set by adjusting the resistance-capacitance parameters of the circuit, and the simulation requirements of different steady-state rotating speeds can be met. Circuit C 4 Designed as an integrating circuit, the input of which is a sine modulation signal U 5 The output is a cosine modulated signal U 6 . Circuit C 5 Designed as multiplier circuit, the input being a carrier signal U 2 And a sinusoidal modulation signal U 5 The output is a sinusoidal feedback winding signal U 3 . Circuit C 6 Designed as multiplier circuit, the input being a carrier signal U 2 And cosine modulated signal U 6 The output is a cosine feedback winding signal U 4 。
In the excitation winding signal overrun detection subsystem shown in fig. 5, in the whole resolver output signal simulation system, the excitation winding signal is used as a key input signal, so that serious faults need to be diagnosed, the simulation system can be automatically stopped, and a user can be prompted. The most serious fault state is that the amplitude of the excitation signal exceeds a set threshold value, and the fault has the risk of causing damage to an analog system or a rotary transformer signal receiving system. The scheme provides a profitReal-time judgment of excitation winding signal U by comparator circuit 1 Is within a set threshold range, wherein the voltage threshold comprises a threshold value V of the maximum value max CM and threshold V for minimum value min CM, the voltage threshold can be adjusted according to different simulation demands in a flexible way, and when the amplitude of the excitation signal exceeds the set threshold, the system can automatically cut off the power supply of a main power supply and simultaneously turn off the working indicator lamp. The subsystem thus comprises 2 comparator circuits C 7 、C 8 1 main power supply automatic cut-off circuit C 9 And 1 main power supply voltage indicator lamp circuit C 10 ；
Circuit C 7 Designed as a comparator circuit, the input of which is a field winding signal U 1 A set value V for determining that the threshold value is the maximum value max CM. When U is turned 1 When the voltage is less than the judgment threshold, the output is high level and is in a normal state. When U is turned 1 When the voltage is greater than the judgment threshold, the output is low level, is in fault state, and the circuit C 8 Designed as a comparator circuit, the input of which is a field winding signal U 1 A set value V for determining that the threshold value is the minimum value min CM. When U is formed 1 When the voltage is greater than the judgment threshold, the output is high level and is in a normal state. When U is turned 1 When the voltage is less than the judgment threshold, the output is low level, and the state is a fault state. Circuit C 9 Designed as a relay control circuit, the input signal of the relay control winding is a circuit C 7 、C 8 The controlled winding is connected to the positive pole of the main power supply. When the circuit C 7 、C 8 When the output of the relay is high level (supplied by the auxiliary power supply), the relay is in a pull-in state, and the main power supply is normal. When the circuit C 7 、C 8 When any output is low level, the relay is disconnected to cut off the power supply of the main power supply. Circuit C 10 Is designed as a main power supply voltage indicator lamp circuit, 1 indicator lamp T0 is connected in parallel between the positive pole and the negative pole of a main power supply, and is arranged on the surface of the shell of the device. When the main power supply is normal, the indicator light is on. When the positive power supply of the main power supply is cut off due to a fault, the indicator lamp is turned off, so that the user is warned.
In the feedback winding fault simulation subsystem shown in fig. 6, the resolver signal receiving system normally has a function of detecting a resolver signal fault in addition to detecting a position signal. In order to improve the function of the simulation device in the aspect of fault simulation, the design provides a design scheme for simulating open circuit and short circuit faults of sine and cosine feedback windings by using a relay circuit, and users can simulate different faults one by operating external buttons. The subsystem comprises 3 relay control circuits, and each circuit is controlled to be closed and opened by an external operation button.
Circuit C 11 The control button is T1, and the control button is designed to control 2-path feedback winding analog signals to switch between 2 modes of static angle and steady-state rotating speed. T1OFF, entering a static angle test mode. And when T1 is ON, entering a steady state rotating speed testing mode. Circuit C 12 Designed to simulate a 2-way feedback winding open circuit fault, the control button is T2. And when T2 is OFF, the feedback winding signals S1 and S2 are respectively conducted, and the 2 feedback winding loops are normal. And when T2 is ON, the feedback winding signals S1 and S2 are respectively disconnected, and the open circuit fault is simulated. Circuit C 13 Designed to simulate a 2-way feedback winding short circuit fault, the control button is T3. T3OFF, circuit C 13 And does not work. And when T3 is ON, the feedback winding signals S1 and S2 are respectively grounded to simulate short-circuit faults.
Based on the above, the invention has simple structure and flexible use, the excitation winding signal overrun detection subsystem can identify the fault that the excitation signal amplitude exceeds the normal value, the protection mechanism is to cut off the main power supply of the system, automatically stop the simulation system, and warn through the working indicator lamp, and the feedback winding fault simulation subsystem can simulate the short circuit and open circuit fault of the 2-path feedback winding. The functions of integrating and simulating the rotary transformer output signal and diagnosing the fault are realized, and the size is reduced.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (9)
1. A device for simulating the output signal of a rotary transformer and providing fault diagnosis is characterized by comprising a rotary-transformer static angle simulation subsystem, a rotary-transformer steady-state rotating speed simulation subsystem, an excitation winding signal overrun detection subsystem, a feedback winding fault simulation subsystem, a main power supply and an auxiliary power supply which are mutually coupled;
the rotary-change static angle simulation subsystem comprises a feedback winding carrier signal generation circuit
And sine and cosine feedback winding signal generating circuit
The feedback winding carrier signal generating circuit
The input end of the transformer is connected with the electromagnetic winding, and the output end of the transformer is connected with the sine and cosine feedback winding signal generating circuit
The sine and cosine feedback winding signal generating circuit
The output end of the transformer is connected with the feedback winding of the subsystem;
the rotational-change steady-state rotating speed simulation subsystem comprises a sine signal generation circuit
Integrating circuit
A first multiplier circuit
And a second multiplier circuit
The sine signal generating circuit
And integrating circuit
Connected, said first multiplier circuit
The input end of the circuit is connected with a sine signal generating circuit
And feedback winding carrier signal generation circuit
The output end of the second multiplier circuit is connected with the sinusoidal feedback winding of the subsystem, and the second multiplier circuit
The input end is connected with an integrating circuit
And feedback winding carrier signal generation circuit
The output end of the transformer is connected with a cosine feedback winding of the subsystem;
the excitation winding signal overrun detection subsystem comprises a first comparator circuit
A second comparator circuit
Main power supply automatic cut-off circuit
And main power supply voltage indicator lamp circuit
Said first comparator circuit
The input of is the excitation winding signal and the maximum judgment threshold value V max CM whose input end is connected with main power supply automatic cut-off circuit
Said second comparator circuit
Is input with the excitation winding signal and the minimum judgment threshold value V min CM with its output end connected to main power supply automatic cut-off circuit
The main power supply automatic cut-off circuit
And main power supply voltage indicator lamp circuit
Connecting;
the feedback winding fault simulation subsystem comprises a first relay control circuit
A second relay control circuit
And a third relay control circuit
The first relay control circuit
The second relay control circuit is used for controlling 2 paths of feedback winding analog signals to be switched between 2 modes of static angle and steady-state rotating speed
The function is to simulate the open circuit fault of the 2-way feedback winding, and the third relay control circuit
The effect is to simulate a 2-way feedback winding short-circuit fault.
2. An apparatus for simulating resolver output signals and providing fault diagnosis according to claim 1, wherein: the feedback winding carrier signal generating circuit
For differential amplifying circuit, the input is the excitation winding signal
The amplification factor is a rotary-to-fixed ratio
Output signal
The sine and cosine feedback winding signal generating circuit
For in-phase amplifying circuits, the input is a signal
The amplification factor is
The output signal is a sine and cosine feedback winding signal.
3. An apparatus for simulating resolver output signals and providing fault diagnosis according to claim 2, wherein: the sine signal generating circuit
Is a sine wave generating circuit, and the output is a sine modulation signal
Said integration circuit
For integrating circuits, the input is a sine-modulated signal
The output is a cosine modulated signal
Said first multiplier circuit
The input being a carrier signal
And a sinusoidal modulation signal
The output is a sinusoidal feedback winding signal
Said second multiplier circuit
The input being a carrier signal
And cosine modulated signal
The output is a cosine feedback winding signal
。
4. An apparatus for simulating resolver output signals and providing fault diagnosis in accordance with claim 1, wherein: the first comparator circuit
And a second comparator circuit
Is a field winding signal
When exciting the winding signal
When the voltage is within the judgment threshold range, the output is at a high level and is in a normal state, and when the voltage is not within the judgment threshold range, the output is at a low level and is in a fault state.
5. An apparatus for simulating resolver output signals and providing fault diagnosis according to claim 4, wherein: the main power supply automatic cut-off circuit
The main power supply automatic cut-off circuit is used for the relay control circuit when the fault state is judged
Cutting off the power supply of the main power supply, wherein the main power supply voltage indicates the circuit of the lamp
And an indicator light T0 is connected, and the indicator light T0 is connected between the positive pole and the negative pole of the main power supply in parallel and is arranged on the surface of the device shell.
6. An apparatus for simulating resolver output signals and providing fault diagnosis according to claim 4, wherein: the judgment threshold value can be adjusted according to different simulation requirements.
7. An apparatus for simulating resolver output signals and providing fault diagnosis in accordance with claim 1, wherein: and the rotary-change static angle simulation subsystem selects 45 degrees as a simulation angle.
8. An apparatus for simulating resolver output signals and providing fault diagnosis in accordance with claim 1, wherein: the main power supply and the auxiliary power supply are both supplied by 220V power frequency alternating current, the output of the main power supply is 15V direct current, and the output of the auxiliary power supply is 5V direct current.
9. An apparatus for simulating resolver output signals and providing fault diagnosis in accordance with claim 8, wherein: automatic cut-off circuit for main power supply of auxiliary power supply
The auxiliary power supply is a first relay control circuit
A second relay control circuit
And a third relay control circuit
And (5) supplying power.
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