CN221305690U - Motor position sensor - Google Patents
Motor position sensorInfo
- Publication number
- CN221305690U CN221305690U CN202322798292.5U CN202322798292U CN221305690U CN 221305690 U CN221305690 U CN 221305690U CN 202322798292 U CN202322798292 U CN 202322798292U CN 221305690 U CN221305690 U CN 221305690U
- Authority
- CN
- China
- Prior art keywords
- clamping groove
- boss
- circuit board
- position sensor
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000006698 induction Effects 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The utility model discloses a motor position sensor, comprising: the induction device comprises a circuit board assembly, an induction device, an upper cover and a connector assembly; the circuit board assembly is provided with a signal conversion hole; the sensing device is provided with a sensing chip, the sensing chip is arranged on one end face of the circuit board assembly close to the signal conversion hole and is opposite to the motor rotor, and a first distance is reserved between the sensing chip and the central axis of the motor rotor; the upper cover is arranged between the motor rotor and the induction chip, and a first gap is formed between the induction chip and the upper end surface of the motor rotor; one end of the connector assembly is connected with the signal conversion hole of the circuit board assembly, and the other end of the connector assembly is connected with an external signal receiving device. The utility model is provided with the induction device, the circuit board assembly and the connector assembly, and can accurately provide key position feedback signals in a dirty or wet environment, support the position detection of the high-speed motor and achieve the effect of adjusting the speed, the position and the electrical angle of the motor with high precision.
Description
Technical Field
The utility model relates to the technical field of position sensors, in particular to a motor position sensor.
Background
Along with the increasing degree of electric motor on automobiles, except for the energy source mode being replaced, some hydraulic and pneumatic actuators are gradually replaced by motors, and all systems using motors are required to be precisely controlled, so that motor position sensors are indispensable parts. In many motor applications, accurate knowledge of the position of the motor rotor is critical to achieving accurate control and monitoring of the motor operating conditions. Such as an electric drive system, a hybrid transmission, a Two-speed transmission, an EPB (caliper system), an EPS (power steering system), a brake-by-wire system (One-Box and Two-Box), and the like, the motor position sensor is a device for measuring the position of a rotor of a motor. The motor position sensor can provide a key position feedback signal so that the control system can adjust the speed, the position and the electric angle of the motor according to the requirement, and a plurality of motors need to be subjected to position control and need to use the position sensor as position feedback; many motors need to be speed controlled, the differentiation of the position is the speed, and the motor rotating speed can be easily calculated by using a position sensor to be used as speed feedback; many synchronous motors need to be subjected to space vector control, the electric angle of the motor has a strict relation with the position of a motor rotor, and the calculation formula of the electric frequency is as follows: the electric angle can be conveniently calculated according to the position of the motor rotor according to the difference value between the electric angle zero degree and the mechanical angle zero degree after the pole logarithm is known.
In the prior art, an electromagnetic position sensor is adopted to measure the position of a motor rotor, however, the following problems still exist:
On the one hand, electromagnetic position sensors are generally sleeved on the rotating shaft of the motor, and if the motor is in a dirty or wet environment, the position sensor cannot be guaranteed to accurately provide a key position feedback signal.
On the other hand, for some high-speed motor position detection, the control system needs to adjust the speed, position and electrical angle of the high-speed motor with high accuracy, and the electromagnetic position sensor needs to pay high cost.
Disclosure of utility model
In view of the above, an object of the present utility model is to provide a motor position sensor.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a motor position sensor, comprising:
The circuit board assembly is provided with a signal conversion hole, and the signal conversion hole is formed along a first direction;
The sensing device is provided with a sensing chip, the sensing chip is arranged on one end face of the circuit board assembly close to the signal conversion hole, the sensing chip is arranged opposite to the motor rotor, and a first distance is reserved between the sensing chip and the central axis of the motor rotor;
The upper cover is arranged between the motor rotor and the induction chip, and a first gap is formed between the induction chip and the upper end face of the motor rotor;
The connector assembly is arranged along the first direction, one end of the connector assembly is connected with the signal conversion hole of the circuit board assembly, and the other end of the connector assembly is connected with an external signal receiving device.
The motor position sensor, wherein the sensing device comprises: the coil is annular, the coil is sleeved on the end face of the circuit board assembly, on which the induction chip is arranged, and the induction chip is arranged outside the coil.
The motor position sensor is characterized in that the connector assembly is internally provided with two terminals, the two terminals are arranged in parallel, each terminal is provided with a first end and a second end, the first ends of the two terminals are connected with the signal conversion hole of the circuit board assembly, and the second ends of the two terminals are connected with the external signal receiving device.
The motor position sensor described above, further comprising: the shell, the one end of shell with connector assembly is connected, the other end of shell with the one end of upper cover is connected, induction system with circuit board subassembly all locates the upper cover with between the shell.
The motor position sensor comprises an upper cover, wherein one end of the upper cover is provided with a first boss and a first clamping groove, the first boss and the first clamping groove are of annular structures, the other end of the housing is provided with a second boss and a second clamping groove, the second boss and the second clamping groove are of annular structures, the first boss is matched with the second clamping groove, the second boss is matched with the first clamping groove, a containing space is formed by encircling the first boss, the first clamping groove, the second boss and the second clamping groove, and the sensing device and the circuit board assembly are all arranged in the containing space.
The motor position sensor is characterized in that one end of the shell is provided with a connecting boss, the connecting boss is connected with the connector assembly and the shell, and the central axis of the connecting boss is parallel to and not collinear with the central axis of the shell.
The motor position sensor is characterized in that a third clamping groove and a fourth clamping groove are formed in the upper end of the connecting boss, the third clamping groove is formed from the upper end face of the connecting boss to the direction opposite to the first direction, and the fourth clamping groove is formed around the connecting boss by taking the central axis of the connecting boss as a shaft.
The motor position sensor described above, further comprising: and the O-shaped ring is sleeved on the fourth clamping groove.
The utility model adopts the technology, so that compared with the prior art, the utility model has the positive effects that:
(1) The utility model is provided with the sensing device and the upper cover, realizes no physical contact, and can accurately provide key position feedback signals even in dirty or wet environments.
(2) The utility model is provided with the circuit board component and the connector component, supports the position detection of the high-speed motor, and achieves the effect of adjusting the speed, the position and the electrical angle of the high-speed motor with high precision.
Drawings
Fig. 1 is a schematic diagram of a motor position sensor of the present utility model.
Fig. 2 is a schematic diagram of a front view of the motor position sensor of the present utility model.
Fig. 3 is a schematic top view of the motor position sensor of the present utility model.
Fig. 4 is a schematic diagram of B-B of fig. 3 in accordance with the present utility model.
Fig. 5 is a schematic diagram of a circuit board assembly of the present utility model.
In the accompanying drawings: 1. a connector assembly; 2. a housing; 3. an upper cover; 4. a circuit board assembly; 5. an induction device; 6. a motor rotor; 7. a connecting boss; 8. an O-ring; 9. a coil; 10. a signal conversion hole; 11. a terminal; 12. a first end; 13. a second end; 14. a first boss; 15. a second clamping groove; 16. a second boss; 17. a first clamping groove; 18. a fourth clamping groove; 19. an induction chip; 20. a central axis of the connecting boss; 21. a central axis of the housing; 22. and a third clamping groove.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments, but not by way of limitation, fig. 1 is a schematic diagram of a motor position sensor according to the utility model, fig. 2 is a schematic diagram of a motor position sensor according to the utility model in front view, fig. 3 is a schematic diagram of a motor position sensor according to the utility model in top view, fig. 4 is a schematic diagram of B-B of fig. 3 according to the utility model, fig. 5 is a schematic diagram of a circuit board assembly according to the utility model, see fig. 1 to 5, showing a motor position sensor according to a preferred embodiment, comprising: the circuit board assembly 4, the sensing device 5, the upper cover 3 and the connector assembly 1, wherein the circuit board assembly 4 is provided with a signal conversion hole 10, the signal conversion hole 10 is formed along a first direction, and the first direction is as follows: as shown in fig. 4, from left to right; the sensing device 5 is provided with a sensing chip 19, the sensing chip 19 is arranged on one end face of the circuit board assembly 4 close to the signal conversion hole 10, the sensing chip 19 is arranged opposite to the motor rotor 6, and as shown in fig. 1, a first distance is reserved between the sensing chip 19 and the central axis of the motor rotor 6; the upper cover 3 is arranged between the motor rotor 6 and the induction chip 19, and as shown in fig. 1, a first gap is formed between the induction chip 19 and the upper end surface of the motor rotor 6; the connector assembly 1 is arranged along the first direction, one end of the connector assembly 1 is connected with the signal conversion hole 10 of the circuit board assembly 4, and the other end of the connector assembly 1 is connected with an external signal receiving device so as to realize non-contact detection of the speed and the position of the motor rotor 6.
It should be noted that, the non-contact type means that the first gap is formed between the induction chip 19 and the upper end surface of the motor rotor 6, that is, the induction chip 19 is not in direct contact with the motor rotor 6.
In a preferred embodiment, the sense die 19 comprises: a first sensor chip for detecting the rotational speed of the motor rotor 6 and a second sensor chip for detecting the position of the motor rotor 6.
Furthermore, the first sensing chip can be selected from Chinese utility model
: An intelligent speed detection sensor, the speed sensor in publication number CN112578141 a.
Further, the second sensor chip may be selected from chinese patent publication No.: the magnetic sensor chip in CN116295721a to realize the position detection of the motor rotor 6.
In a further preferred embodiment, the sensor chip 19 detects the linear speed of rotation driven by the motor rotor 6, and the rotational speed of the sensor chip 19 can be calculated when the first distance is determined.
In a preferred embodiment, the circuit board assembly 4 is a PCBA (printed Circuit Board), which is a key to providing a position feedback signal at low cost and high accuracy.
Further, as shown in fig. 5, the induction device 5 includes: the coil 9, the coil 9 takes the form of annular, and the coil 9 cover is established on the terminal surface that circuit board subassembly 4 was provided with the induction chip 19, and the outside of coil 9 is located to the induction chip 19.
In a preferred embodiment, the connector assembly 1 has two terminals 11 inside, as shown in fig. 4, the two terminals 11 are arranged in parallel, each terminal 11 has a first end 12 and a second end 13, the first ends 12 of the two terminals 11 are connected to the signal conversion holes 10 of the circuit board assembly 4, and the second ends 13 of the two terminals 11 are connected to the external signal receiving device.
The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the embodiments and the protection scope of the present utility model.
The present utility model has the following embodiments based on the above description:
In a preferred embodiment, further comprising: the casing 2, the one end and the connector assembly 1 of casing 2 are connected, and the other end and the one end of upper cover 3 of casing 2 are connected, and induction system 5 and circuit board subassembly 4 all locate between upper cover 3 and the casing 2.
In a preferred embodiment, as shown in fig. 4, one end of the upper cover 3 is provided with a first boss 14 and a first clamping groove 17, the first boss 14 and the first clamping groove 17 are both in an annular structure, the other end of the housing 2 is provided with a second boss 16 and a second clamping groove 15, the second boss 16 and the second clamping groove 15 are both in an annular structure, the first boss 14 is matched with the second clamping groove 15, the second boss 16 is matched with the first clamping groove 17, a containing space is formed by surrounding the first boss 14, the first clamping groove 17, the second boss 16 and the second clamping groove 15, and the sensing device 5 and the circuit board assembly 4 are all arranged in the containing space.
In a preferred embodiment, the housing 2 has a connection boss 7 at one end, the connection boss 7 connecting the connector assembly 1 and the housing 2, as can be seen in fig. 4, the central axis 20 of the connection boss and the central axis 21 of the housing being parallel and non-collinear.
In a preferred embodiment, the upper end of the connection boss 7 is provided with a third clamping groove 22 and a fourth clamping groove 18, the third clamping groove 22 is formed from the upper end surface of the connection boss 7 to a direction opposite to the first direction, and the fourth clamping groove 18 is formed around the circumference of the connection boss 7 by taking the central axis of the connection boss as a collar.
In a preferred embodiment, further comprising: the O-shaped ring 8,O is sleeved on the fourth clamping groove 18 to increase tightness.
The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (8)
1. Motor position sensor, its characterized in that includes:
The circuit board assembly is provided with a signal conversion hole, and the signal conversion hole is formed along a first direction;
The sensing device is provided with a sensing chip, the sensing chip is arranged on one end face of the circuit board assembly close to the signal conversion hole, the sensing chip is arranged opposite to the motor rotor, and a first distance is reserved between the sensing chip and the central axis of the motor rotor;
The upper cover is arranged between the motor rotor and the induction chip, and a first gap is formed between the induction chip and the upper end face of the motor rotor;
The connector assembly is arranged along the first direction, one end of the connector assembly is connected with the signal conversion hole of the circuit board assembly, and the other end of the connector assembly is connected with an external signal receiving device.
2. The motor position sensor of claim 1, wherein the sensing means comprises: the coil is annular, the coil is sleeved on the end face of the circuit board assembly, on which the induction chip is arranged, and the induction chip is arranged outside the coil.
3. The motor position sensor of claim 1, wherein said connector assembly has two terminals disposed in parallel therein, each of said terminals having a first end and a second end, said first ends of said terminals being connected to said signal conversion aperture of said circuit board assembly, said second ends of said terminals being connected to said external signal receiving means.
4. The motor position sensor as recited in claim 1, further comprising: the shell, the one end of shell with connector assembly is connected, the other end of shell with the one end of upper cover is connected, induction system with circuit board subassembly all locates the upper cover with between the shell.
5. The motor position sensor according to claim 4, wherein one end of the upper cover is provided with a first boss and a first clamping groove, the first boss and the first clamping groove are both in an annular structure, the other end of the housing is provided with a second boss and a second clamping groove, the second boss and the second clamping groove are both in an annular structure, the first boss is matched with the second clamping groove, the second boss is matched with the first clamping groove, a containing space is formed by surrounding the first boss, the first clamping groove, the second boss and the second clamping groove, and the sensing device and the circuit board assembly are both arranged in the containing space.
6. The motor position sensor of claim 4 wherein one end of the housing has a connection boss connecting the connector assembly and the housing, the connection boss having a central axis that is parallel and non-collinear with the central axis of the housing.
7. The motor position sensor according to claim 6, wherein the upper end of the connection boss has a third clamping groove and a fourth clamping groove, the third clamping groove is formed from the upper end surface of the connection boss to a direction opposite to the first direction, and the fourth clamping groove is formed around the connection boss by taking the central axis of the connection boss as an axis.
8. The motor position sensor as recited in claim 7, further comprising: and the O-shaped ring is sleeved on the fourth clamping groove.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221305690U true CN221305690U (en) | 2024-07-09 |
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| GR01 | Patent grant |