CN210246636U - Motor detection system and electric automobile applying same - Google Patents
Motor detection system and electric automobile applying same Download PDFInfo
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- CN210246636U CN210246636U CN201920970434.2U CN201920970434U CN210246636U CN 210246636 U CN210246636 U CN 210246636U CN 201920970434 U CN201920970434 U CN 201920970434U CN 210246636 U CN210246636 U CN 210246636U
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Abstract
The utility model relates to a motor detecting system and applied this detecting system's electric automobile. The system comprises: stator winding, direct current filter circuit, biasing circuit, port filter circuit and analog-to-digital conversion circuit. The direct current filter circuit comprises a blocking capacitor and a load resistor which are connected in series, and the input end of the bias circuit inputs control voltage and is connected with the direct current filter circuit. The detection system can effectively detect the angle and the position of the motor, and has wide application range.
Description
Technical Field
The utility model relates to an automobile technical field especially relates to a motor detection system and applied this detecting system's electric automobile.
Background
The resolver is an electromagnetic sensor, also known as a resolver, and can be used to drive an electric vehicle. The small AC motor for measuring angle is used to measure the angular displacement and speed of rotating shaft of rotating object and consists of stator and rotor, in which the stator winding is used as the primary side of transformer to receive exciting voltage. The rotor winding is used as a secondary side of the transformer, and induction voltage is obtained through electromagnetic coupling.
The existing rotary transformer comprises a primary side excitation winding and two secondary side windings, wherein the two secondary side windings are arranged at 90 degrees, and the relative magnetic coupling path of the secondary side windings can be changed along with the angular displacement of a rotor, so that the magnitude of the secondary side voltage can be changed along with the angular displacement, and the detection accuracy of the rotary transformer is not very high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a motor detection system and applied this detecting system's electric automobile can detect motor angle and position effectively, and the range of application is extensive.
In order to solve the above technical problem, the following provides a motor detection system, including: a stator winding; the direct current filter circuit comprises a blocking capacitor and a load resistor which are mutually connected in series, and one end of the direct current filter circuit is connected with the stator winding; the input end of the bias circuit inputs control voltage, and the output end of the bias circuit is connected with the other end of the direct current filter circuit; the input end of the port filter circuit is connected with the direct current filter circuit; and the analog-to-digital conversion circuit is connected with the output end of the port filter circuit.
Optionally, the dc blocking capacitor includes a first capacitor and a second capacitor, and the load resistor includes a first resistor and a second resistor; one end of the first capacitor is connected with one end of the stator winding, one end of the first resistor is connected with the other end of the first capacitor, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is connected with one end of the second capacitor; the other end of the second capacitor is connected with the other end of the stator winding.
Optionally, the bias circuit includes a third resistor and a fourth resistor; one end of the third resistor is the input end of the bias circuit, the other end of the third resistor is connected with one end of the fourth resistor, the other end of the fourth resistor is grounded, and the third resistor is connected with the fourth resistor and the first resistor is connected with the second resistor through a lead.
Optionally, the port filter circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a third capacitor; one end of the fifth resistor is connected with one end of the first resistor, the other end of the fifth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the other end of the second resistor, and the third capacitor is connected with the seventh resistor in parallel.
Optionally, the analog-to-digital conversion circuit includes a first input terminal and a second input terminal; the first input end and the second input end are respectively connected with two ends of the third capacitor.
In a second aspect, the embodiment of the application provides an electric vehicle using the detection system, and the electric vehicle includes the motor detection system.
In the technical scheme, the detection of the angle and the position of the motor with low cost is realized through the stator winding, the direct current filter circuit, the bias circuit, the port filter circuit and the analog-to-digital conversion circuit which are connected with one another, and the universality is realized.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a motor detection system according to the present application;
fig. 2 is a schematic structural diagram of another embodiment of the motor detection system of the present application.
Detailed Description
The following describes a motor detection system and an electric vehicle using the same in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of an embodiment of the motor detection system of the present application, and as shown in fig. 1, the system may include:
a stator winding S1 (S2);
the direct current filter circuit 11, the direct current filter circuit 11 includes a blocking capacitor and a load resistor connected in series, and one end of the direct current filter circuit 11 is connected with the stator winding;
the input end of the bias circuit 12 inputs control voltage, and the output end of the bias circuit 12 is connected with the other end of the direct current filter circuit 11;
the input end of the port filter circuit 13 is connected with the direct current filter circuit 11 and is used for eliminating high-frequency interference possibly existing in the signal;
and the analog-to-digital conversion circuit 14 is connected with the output end of the port filter circuit 13.
Specifically, the dc filter circuit 11 is a first-order high-pass filter composed of a dc blocking capacitor and a load resistor, and is configured to filter a dc component.
Please refer to fig. 2, wherein in a possible implementation manner, the dc blocking capacitor includes a first capacitor C1 and a second capacitor C2, and the load resistor includes a first resistor R1 and a second resistor R2;
one end of the first capacitor C1 is connected to one end of the stator winding S1(S2),
one end of the first resistor R1 is connected to the other end of the first capacitor C1,
the other end of the first resistor R1 is connected with one end of the second resistor R2,
the other end of the second resistor R2 is connected with one end of the second capacitor C2;
the other end of the second capacitor C2 is connected to the other end of the stator winding S1 (S2).
Wherein in one possible implementation, the bias circuit 12 includes a third resistor R3 and a fourth resistor R4;
one end of the third resistor R3 is the bias circuit input end,
the other end of the third resistor R3 is connected with one end of the fourth resistor R4,
the other end of the fourth resistor R4 is grounded,
the third resistor R3 and the fourth resistor R4 are connected with the first resistor R1 and the second resistor R2 through a lead.
In one possible implementation manner, the port filter circuit 13 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a third capacitor C3;
one end of the fifth resistor R5 is connected with one end of the first resistor R1,
the other end of the fifth resistor R5 is connected with one end of the seventh resistor R7,
the other end of the seventh resistor R7 is connected with one end of the sixth resistor R6,
the other end of the sixth resistor R6 is connected with the other end of the second resistor R2,
the third capacitor C3 is connected in parallel with the seventh resistor R7.
In one possible implementation, the analog-to-digital conversion circuit 14 includes a first input terminal and a second input terminal;
the first input end and the second input end are respectively connected with two ends of the third capacitor C3.
Specifically, the analog-to-digital conversion circuit 14 is configured to send the voltage across the third capacitor C3 obtained through the first-order low-pass filter to the first input terminal ADC1 and the second input terminal ADC2 of the analog-to-digital conversion circuit 14, respectively, trigger simultaneous sampling, then perform a difference on two sampled values, and multiply by a voltage division ratio determined by the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 of the resistor voltage division network, so as to obtain a voltage value on the secondary winding, thereby calculating the angle and the position of the motor.
The embodiment of the present application further provides an electric vehicle using the detection system, and the electric vehicle may include the motor detection system provided in the embodiment shown in fig. 1 and fig. 2 of the present application.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A motor detection system, comprising:
a stator winding;
the direct current filter circuit comprises a blocking capacitor and a load resistor which are mutually connected in series, and one end of the direct current filter circuit is connected with the stator winding;
the input end of the bias circuit inputs control voltage, and the output end of the bias circuit is connected with the other end of the direct current filter circuit;
the input end of the port filter circuit is connected with the direct current filter circuit;
and the analog-to-digital conversion circuit is connected with the output end of the port filter circuit.
2. The system of claim 1, wherein the dc blocking capacitance comprises a first capacitance and a second capacitance, and the load resistance comprises a first resistance and a second resistance;
one end of the first capacitor is connected with one end of the stator winding,
one end of the first resistor is connected with the other end of the first capacitor,
the other end of the first resistor is connected with one end of the second resistor,
the other end of the second resistor is connected with one end of the second capacitor;
the other end of the second capacitor is connected with the other end of the stator winding.
3. The system of claim 2, wherein the bias circuit comprises a third resistor and a fourth resistor;
one end of the third resistor is the input end of the bias circuit,
the other end of the third resistor is connected with one end of the fourth resistor,
the other end of the fourth resistor is grounded,
the third resistor and the fourth resistor are connected with the first resistor and the second resistor through a lead.
4. The system of claim 2, wherein the port filter circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, and a third capacitor;
one end of the fifth resistor is connected with one end of the first resistor,
the other end of the fifth resistor is connected with one end of the seventh resistor,
the other end of the seventh resistor is connected with one end of the sixth resistor,
the other end of the sixth resistor is connected with the other end of the second resistor,
the third capacitor is connected with the seventh resistor in parallel.
5. The system of claim 4, wherein the analog-to-digital conversion circuit comprises a first input and a second input;
the first input end and the second input end are respectively connected with two ends of the third capacitor.
6. An electric vehicle comprising the motor detection system according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920970434.2U CN210246636U (en) | 2019-06-26 | 2019-06-26 | Motor detection system and electric automobile applying same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920970434.2U CN210246636U (en) | 2019-06-26 | 2019-06-26 | Motor detection system and electric automobile applying same |
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| CN210246636U true CN210246636U (en) | 2020-04-03 |
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| CN201920970434.2U Active CN210246636U (en) | 2019-06-26 | 2019-06-26 | Motor detection system and electric automobile applying same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051535A (en) * | 2020-09-28 | 2020-12-08 | 珠海格力电器股份有限公司 | Signal determination device, storage medium, and electronic device |
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2019
- 2019-06-26 CN CN201920970434.2U patent/CN210246636U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051535A (en) * | 2020-09-28 | 2020-12-08 | 珠海格力电器股份有限公司 | Signal determination device, storage medium, and electronic device |
| CN112051535B (en) * | 2020-09-28 | 2021-10-22 | 珠海格力电器股份有限公司 | Signal determination method and device, storage medium and electronic device |
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