CN112564553A

CN112564553A - Method and device for identifying motor with Hall sensor

Info

Publication number: CN112564553A
Application number: CN201910910840.4A
Authority: CN
Inventors: 曾海泳
Original assignee: Brose Fahrzeugteile SE and Co KG
Current assignee: Brose Fahrzeugteile SE and Co KG
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2021-03-26

Abstract

The invention relates to a method and a device for identifying a motor with a Hall sensor. The method comprises the following steps: transmitting a plurality of voltage vectors to the motor; reading a set of Hall sensor states from all Hall sensors, respectively, corresponding to each of the plurality of voltage vectors; and identifying the motor according to the states of the plurality of groups of Hall sensors. The invention also relates to a device for identifying the motor with the Hall sensor.

Description

Method and device for identifying motor with Hall sensor

Technical Field

The invention relates to a method and a device for identifying a motor with a Hall sensor.

Background

In order for a control system of a dc motor, particularly a control system of a brushless dc three-phase motor, to correctly perform drive control of the motor, the control system must have characteristic parameters associated with the type of the motor. For example, in current automotive transmission control systems, the transmission requires the use of different oil pumps from different suppliers. The control system needs to identify the type of the motor to be driven in the oil pump by information provided by the supplier of the oil pump in the form of a tag such as a two-dimensional code, so as to realize the driving of the oil pump in the gearbox, i.e. the interchangeability of different motors for the control system.

For example, in the square wave control of the brushless dc three-phase motor, a 360 ° magnetic field space is divided into six sectors (S1-S6), one sector every 60 °. The commutation of the motor is carried out in sectors as the minimum unit, each sector corresponding to a unique three-phase direct current conduction state (U, V, W). Depending on the voltage vector used for driving, the rotor is subjected to electromagnetic forces in different directions in the on state of each sector, and each rotor is rotated to a specific position. Hall sensors (H1, H2, H3) may provide information of this particular position to the control system. The control system must know the type of electric machine in advance in order to achieve full interchangeability of the oil pump in the gearbox.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a method and an apparatus for identifying a motor with hall sensors, which can automatically identify a type of the motor according to states of a plurality of groups of hall sensors of the hall sensors equipped in the motor. Thereby realizing interchangeability of different motors for the control system.

According to an aspect of an embodiment of the present invention, there is provided a method of identifying a motor with a hall sensor, the method including:

transmitting a plurality of voltage vectors to the motor;

reading a set of Hall sensor states from all Hall sensors, respectively, corresponding to each of the plurality of voltage vectors; and

and identifying the motor according to the states of the plurality of groups of Hall sensors.

Optionally, identifying the motor further comprises: the identification is made by comparing the plurality of sets of hall sensor states with standard hall sensor states of the motor.

Optionally, identifying the motor further comprises: identifying a motor type of the motor or identifying a fault condition of the motor.

Optionally, the number of the plurality of voltage vectors is 3; or the number of the plurality of voltage vectors is any one of 4 to 6.

Optionally, the voltage vector is a constant space vector.

Optionally, the motor is a brushless dc three-phase motor with a hall sensor.

According to still another aspect of an embodiment of the present invention, there is provided an apparatus for identifying a motor with a hall sensor, the apparatus including:

the transmitting module is used for transmitting a plurality of voltage vectors to the motor;

a reading module for reading a set of hall sensor states from all hall sensors respectively corresponding to each of the plurality of voltage vectors; and

and the identification module is used for executing the identification of the motor according to the states of the plurality of groups of Hall sensors.

Optionally, the identification module is further configured to: the identification of the motor is performed by comparing the plurality of sets of hall sensor states with standard hall sensor states of the motor.

Optionally, the identification module is further configured to: identifying a motor type of the motor or identifying a fault condition of the motor.

Optionally, the voltage vector is a constant space vector.

Optionally, the motor is a brushless dc three-phase motor with a hall sensor.

According to yet another aspect of an embodiment of the present invention, a computer-readable medium is provided. On said computer readable medium a computer program is stored which, when being executed by a processor, carries out the method of identifying a motor with a hall sensor as provided by the first aspect of an embodiment of the present invention.

Further effects of the above-mentioned non-conventional alternatives will be described below in connection with specific embodiments.

Drawings

The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:

FIG. 1 is a schematic diagram of a method of identifying a motor with a Hall sensor according to an embodiment of the invention;

FIG. 2 is a flow chart of specific steps of a method of identifying a motor with a Hall sensor according to an embodiment of the invention;

fig. 3 is a schematic view of an apparatus for identifying a motor with a hall sensor according to an embodiment of the present invention.

FIG. 4 is an exemplary system architecture diagram in which embodiments of the present invention may be employed; and

FIG. 5 is a block diagram of a computer system suitable for use in implementing the methods or apparatus of embodiments of the invention.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

Fig. 1 is a schematic view of a method of identifying a motor with a hall sensor according to an embodiment of the present invention. As shown in fig. 1, a method of identifying a motor with a hall sensor according to an embodiment of the present invention includes the steps of:

step S10: transmitting a plurality of voltage vectors to the motor;

step S20: reading a set of Hall sensor states from all Hall sensors, respectively, corresponding to each of the plurality of voltage vectors; and

step S30: and identifying the motor according to the states of the plurality of groups of Hall sensors.

Fig. 2 is a flowchart illustrating specific steps of a method for identifying a motor with a hall sensor according to an embodiment of the present invention. As shown in fig. 2, in step S201, the motor control system sends a voltage vector to the motor and holds it for a certain period of time. In step S202, the motor control system reads a set of hall sensor states from all the hall sensors and stores the set of hall sensor states in a hall sensor state table of the motor. In the hall sensor state table, the read states of a group of hall sensors correspond to voltage vectors one to one. In step S203, it is determined whether the number of voltage vectors transmitted to the motor reaches a predetermined number. If the number of voltage vectors does not reach the predetermined number, it returns to step S201. If the number of voltage vectors has reached the predetermined number, the process proceeds to step S204. In step S204, the motor is identified by comparing the stored sets of hall sensor states with standard hall sensor states for the motor.

The standard hall sensor state of the motor depends on the specific structure and design of the motor, and different brands of motors have different structures, so that each brand of motor has different standard hall sensor states for the same voltage vector. In the identification process of the motor, if the read state of the Hall sensor is consistent with the state of a standard Hall sensor of the motor, the type of the motor can be identified. The following shows, as an example, the standard Hall sensor states (Hall-1 to Hall-3) of brushless dc three-phase motors with Hall sensors used in two different brands of oil pumps (Brose and Buehler) with the same voltage vector.

Table 1: standard Hall sensor state for motor in Brose oil pump

Voltage vector	Hall-1	Hall-2	Hall-3
				S1	1	0	1
S2	1	0	0
				S3	1	1	0
S4	0	1	0
				S5	0	1	1
S6	0	0	1

Table 2: standard Hall sensor status for motors in Buehler oil pumps

Voltage vector	Hall-1	Hall-2	Hall-3
				S1	0	1	0
S2	1	1	0
				S3	1	0	0
S4	1	0	1
				S5	0	0	1
S6	0	1	1

According to the embodiment of the invention, on the premise that the type of a certain motor is known, if the state of the Hall sensor read in the identification process of the motor is inconsistent with the state of a standard Hall sensor of the motor, the motor can be judged to be in a fault state. I.e. the identification of the fault state of the motor can be achieved.

According to the embodiment of the invention, in 6 groups of standard hall sensor states of the brushless direct current three-phase motor corresponding to 6 different voltage vectors, 3 groups of standard hall sensor states are mutually opposite. For example, as can be seen from tables 1 and 2, the hall sensor states corresponding to the voltage vectors S1 and S4, S2 and S5, and S3 and S6 are opposite to each other. Therefore, only at least one group of each pair of mutually-reversed Hall sensor states needs to be acquired, and the type of the motor can be successfully identified under the condition that 3 groups of Hall sensor state acquisition are performed at least. That is, the number of voltage vectors used in the identification process of the motor may be only 3. Of course, the number of voltage vectors used may be any of 4 to 6. The different voltage vectors S1 to S6 can be distinguished by different states of the three-phase voltage (U, V, W, respectively) of the electric machine. If a certain phase of the three phases is represented by the symbol "+" to be connected to the positive supply and a certain phase of the three phases is represented by the symbol "-" to be connected to the negative supply, the voltage vectors S1 to S6 may be represented as, for example:

S1：U+，V-，W-

S2：U-，V+，W-

S3：U-，V-，W+

S4：U-，V+，W+

S5：U+，V-，W+

S6：U+，V+，W-

according to an embodiment of the present invention, the voltage vector used in the identification process of the motor may be a constant space vector. The lengths of the voltage pulses of these voltage vectors may be different, i.e. different hold times may be achieved. In addition, the magnitudes of the voltage pulses of these voltage vectors may also be different in order to provide different magnitudes of drive currents.

Fig. 3 is a schematic view of an apparatus 30 for identifying a motor with a hall sensor according to an embodiment of the present invention. As shown in fig. 3, the apparatus 30 for identifying a motor with a hall sensor includes: a transmitting module 310, configured to transmit a plurality of voltage vectors to a motor; a reading module 320, configured to read a group of hall sensor states from all the hall sensors respectively corresponding to each of the plurality of voltage vectors; and an identification module 330, configured to perform identification of the motor according to states of the plurality of groups of hall sensors. The identification module 330 may also perform motor identification by comparing the plurality of hall sensor states with a standard hall sensor state of the motor. And wherein the identification module 330 can identify not only the motor type of the motor, but also a fault state of the motor on the premise that the motor type is known.

Fig. 4 shows an exemplary system architecture 400 of a method for identifying a motor with a hall sensor or an apparatus for identifying a motor with a hall sensor to which embodiments of the invention can be applied. As shown in fig. 4, the system architecture 400 may include

terminal devices

401, 402, 403, a network 404, and a server 405. The network 404 serves as a medium for providing communication links between the

terminal devices

401, 402, 403 and the server 405. Network 404 may include various types of connections, such as wire, wireless communication links, or fiber optic cables, to name a few.

A user may use

terminal devices

401, 402, 403 to interact with a server 405 over a network 404 to receive or send messages or the like. Various communication client applications may be installed on the

terminal devices

401, 402, 403. The

terminal devices

401, 402, 403 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, laptop portable computers, desktop computers, and the like.

The server 405 may be a server that provides various services. It should be noted that the method for identifying the motor with the hall sensor provided by the embodiment of the present invention is generally performed by the server 405, and accordingly, the device for identifying the motor with the hall sensor is generally disposed in the server 405.

It should be understood that the number of terminal devices, networks, and servers in fig. 4 is merely illustrative. There may be any number of terminal devices, networks, and servers, as desired for implementation.

Referring now to fig. 5, a block diagram of a computer system 500 suitable for implementing a method for identifying a motor with a hall sensor or an apparatus for identifying a motor with a hall sensor of an embodiment of the present invention is shown. The terminal device shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.

As shown in fig. 5, the computer system 500 includes a Central Processing Unit (CPU)501 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM)502 or a program loaded from a storage section 508 into a Random Access Memory (RAM) 503. In the RAM 503, various programs and data necessary for the operation of the system 500 are also stored. The CPU 501, ROM 502, and RAM 503 are connected to each other via a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.

The following components are connected to the I/O interface 505: an input portion 506 including a keyboard, a mouse, and the like; an output portion 507 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage portion 508 including a hard disk and the like; and a communication section 509 including a network interface card such as a LAN card, a modem, or the like. The communication section 509 performs communication processing via a network such as the internet. The driver 510 is also connected to the I/O interface 505 as necessary. A removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 510 as necessary, so that a computer program read out therefrom is mounted into the storage section 508 as necessary.

In particular, according to the embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 509, and/or installed from the removable medium 511. The computer program performs the above-described functions defined in the system of the present invention when executed by the Central Processing Unit (CPU) 501.

The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of identifying a motor with a hall sensor, comprising:

transmitting a plurality of voltage vectors to the motor;

2. The method of claim 1, wherein identifying the motor further comprises: the identification is made by comparing the plurality of sets of hall sensor states with standard hall sensor states of the motor.

3. The method of claim 1 or 2, wherein identifying the motor further comprises: identifying a motor type of the motor or identifying a fault condition of the motor.

4. The method of any of the preceding claims, wherein the number of the plurality of voltage vectors is 3.

5. The method of any of the preceding claims, wherein the number of the plurality of voltage vectors is any of 4 to 6.

6. The method of any preceding claim, wherein the voltage vector is a constant space vector.

7. Method according to any of the preceding claims, characterized in that the motor is a brushless direct current three-phase motor with hall sensors.

8. An apparatus for identifying a motor having a hall sensor, comprising:

9. The apparatus of claim 8, wherein the identification module is further configured to: the identification of the motor is performed by comparing the plurality of sets of hall sensor states with standard hall sensor states of the motor.

10. The apparatus of claim 8 or 9, wherein the identification module is further configured to: identifying a motor type of the motor or identifying a fault condition of the motor.

11. The apparatus of any one of claims 8 to 10, wherein the number of the plurality of voltage vectors is 3.

12. The apparatus of any of claims 8 to 11, wherein the number of the plurality of voltage vectors is any of 4 to 6.

13. The apparatus of any one of claims 8 to 12, wherein the voltage vector is a constant space vector.

14. The method according to any one of claims 8 to 13, wherein the motor is a brushless dc three-phase motor with hall sensors.

15. A computer-readable medium, on which a computer program is stored, which program, when being executed by a processor, is able to carry out the method of any one of claims 1-7.