Control chip and motor control device

Abstract

The utility model provides a control chip, include: first pin, second pin, third pin, brake unit, circuit pull up unit, circuit pull down unit and fault detection unit, the input end of fault detection unit connects third pin, and the output end connects the control end of circuit pull down unit, the first end of circuit pull down unit connects first pin, and the second end is grounded, the input end of brake unit connects first pin, and the output end connects second pin, the first end of circuit pull up unit connects pull up voltage, and the second end connects first pin. The utility model also provides a motor control device including motor and control chip, and the motor is through third pin for control chip input fault indication signal, and receives brake signal through second pin and brakes. The utility model through pin sharing, after the fault event occurs, makes first pin can output fault signal and can trigger brake unit output brake signal, and then makes motor and timely brake.

Description

Technical Field

[0001] This utility model relates to the field of automatic control, and in particular to a control chip and a motor control device. Background Technology

[0002] Electric motors are widely used in industry, transportation, and home appliances. In practical applications, motor failures and braking events are often closely related to the safety of industrial equipment, home appliances, automobiles, and other devices. These two events are typically handled by the motor system's controller. However, with the gradual development of technology, the cost of motor controllers is decreasing while their performance is increasing, which places extremely high demands on the rapid response capabilities of fault protection systems in industrial equipment, home appliances, automobiles, and other devices.

[0003] Therefore, how to design a motor controller that can quickly and accurately handle fault events has become one of the technical problems that urgently need to be solved by those skilled in the art.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a control chip and a motor control device to solve the problem that the prior art cannot handle fault events quickly and accurately.

[0006] To achieve the above and other related objectives, this utility model provides a control chip, which includes at least: a first pin, a second pin, a third pin, a braking unit, a circuit pull-up unit, a circuit pull-down unit, and a fault detection unit; the first pin is connected to the input terminal of the braking unit, and the output terminal of the braking unit is connected to the second pin; the first terminal of the circuit pull-up unit is connected to the pull-up voltage, and the second terminal is connected to the first pin; the first terminal of the circuit pull-down unit is connected to the first pin, the second terminal is grounded, and the control terminal is connected to the output terminal of the fault detection unit; the input terminal of the fault detection unit is connected to the third pin.

[0007] Optionally, the pull-up voltage is 3.3V or 5V.

[0008] Optionally, the circuit pull-up unit includes a pull-up resistor, with a first end connected to the pull-up voltage and a second end connected to the first pin.

[0009] Alternatively, the sum of the values ​​of the pull-up resistors may range from 10kΩ to 100kΩ.

[0010] Optionally, the circuit pull-down unit includes an NMOS transistor, the drain of which is connected to the first pin, the source is grounded, and the gate is connected to the output terminal of the fault detection unit.

[0011] Optionally, the control chip further includes a configuration unit and a fourth pin; the input terminal of the configuration unit is connected to the fourth pin, and the output terminal is connected to the control terminal of the fault detection unit and the control terminal of the braking unit, respectively.

[0012] To achieve the above and other related objectives, this utility model also provides a motor control device, which includes at least: a motor and the control chip; the signal input terminal of the motor is connected to the second pin of the control chip, and the signal output terminal is connected to the third pin of the control chip.

[0013] Optionally, if the control chip further includes a configuration unit, the motor control device further includes a computer, and the computer is connected to the fourth pin corresponding to the input terminal of the configuration unit.

[0014] Alternatively, the computer can be wirelessly connected to the fourth pin.

[0015] As described above, the control chip and motor control device of this utility model have the following beneficial effects:

[0016] 1. By sharing the pins corresponding to the output of the fault detection unit and the pins corresponding to the input of the braking unit, the control chip can not only output a fault signal in a timely manner after a fault event occurs, but also enable the braking unit to output a braking signal in a timely manner.

[0017] 2. The pin sharing of this utility model is in line with the development trend of increasingly higher integration of motor controllers. Moreover, the faster the processing speed of the control signal, the better the processing effect of this utility model.

[0018] 3. By setting up a configuration unit, this utility model enables the control chip to flexibly select different working modes, thereby improving the flexibility of the control chip. Attached Figure Description

[0019] Figure 1 The diagram shown is a structural schematic of the control chip of this utility model.

[0020] Figure 2 The diagram shown illustrates the first operating mode of the control chip of this utility model.

[0021] Figure 3The diagram shown illustrates the second operating mode of the control chip of this utility model.

[0022] Figure 4 The diagram shown illustrates the third operating mode of the control chip of this utility model.

[0023] Figure 5 The diagram shown is a first structural schematic of the motor control device of this utility model.

[0024] Figure 6 The diagram shown is a second structural schematic of the motor control device of this utility model.

[0025] Component designation explanation

[0026] 1. Control chip

[0027] 11 First pin

[0028] 12 Second pin

[0029] 13 Third pin

[0030] 14. Circuit pull-up unit

[0031] 15. Circuit pull-down unit

[0032] 16 Braking Units

[0033] 17 Fault Detection Unit

[0034] 18 Configuration Units

[0035] 19. Pin 4

[0036] 2 motors

[0037] 3. Computer Detailed Implementation

[0038] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0039] Please see Figures 1-6 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the illustrations only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] In the development of electric motors, the integration of motor controllers has become increasingly higher, resulting in smaller controller sizes. Simultaneously, the speed at which motor controllers process control signals has increased. However, on the one hand, the smaller size of the motor controller may reduce its functionality, thus affecting the speed of event processing. On the other hand, the faster speed of control signals may decrease the accuracy of event processing. For fault event handling, which is closely related to automotive safety, both processing speed and accuracy are crucial.

[0041] Therefore, this invention designs a control chip that shares the pins corresponding to the output of the fault detection unit and the pins corresponding to the input of the braking unit. This allows the control chip to promptly and correctly handle fault events without performing logical judgments on the fault signals. For the control chip, fault event handling includes braking signal output and fault signal output. The specific technical solution of this invention is as follows:

[0042] Example 1

[0043] like Figure 1 As shown, this embodiment provides a control chip 1, including: a first pin 11, a second pin 12, a third pin 13, a braking unit 16, a circuit pull-up unit 14, a circuit pull-down unit 15, and a fault detection unit 17.

[0044] like Figure 1 As shown, the first pin 11 is connected to the input terminal of the braking unit 16, and the output terminal of the braking unit 16 is connected to the second pin 12.

[0045] Specifically, in this embodiment, the first pin 11 is configured as an input / output port. On one hand, it can be used to output a fault signal; on the other hand, it can be used to receive an external braking trigger signal. Further, the braking unit 16 is connected between the first pin 11 and the second pin 12, used to receive the braking trigger signal and output a braking signal. As an example, the braking unit 16 can be a TIM (Timer). When a fault event occurs, the TIM receives the braking trigger signal and controls the PWM output (PWM, Pulse Width Modulation) by enabling its internal break function, i.e., outputting a braking signal. In practical applications, the specific type of the braking unit 16 can be set as needed, and is not limited to this embodiment.

[0046] like Figure 1 As shown, the first end of the pull-up unit 14 is connected to the pull-up voltage VDD, and the second end is connected to the first pin 11.

[0047] Specifically, in this embodiment, the first end of the pull-up unit 14 is connected to the first pin 11, making the first pin 11 an open-drain pin. That is, the first pin 11 remains high when it does not receive external signals from the control chip 1 or when no fault event occurs. Further, the pull-up voltage VDD is determined by the digital voltage of the control chip 1, and the voltage of the pull-up voltage VDD is typically 3.3V or 5V. Even further, as... Figure 1 As shown, the circuit pull-up unit 14 includes a pull-up resistor R1. The first end of the pull-up resistor R1 is connected to the pull-up voltage, and the second end is connected to the first pin 11. The sum of the resistance values ​​of the pull-up resistor R1 ranges from 10kΩ to 100kΩ, including but not limited to 20kΩ, 30kΩ, 40kΩ, 50kΩ, 60kΩ, 70kΩ, 80kΩ, and 90kΩ. In practical applications, the specific resistance value of the pull-up resistor R1 can be set as needed, and is not limited to this embodiment.

[0048] like Figure 1 As shown, the first end of the circuit pull-down unit 15 is connected to the first pin 11, the second end is grounded, and the control end is connected to the output end of the fault detection unit 17.

[0049] Specifically, in this embodiment, the connection method of the circuit pull-down unit 15 determines that after the fault detection unit 17 detects a fault event, the circuit pull-down unit 15 is turned on, and the first pin 11 is pulled low to ground. Further, after the first pin 11 is pulled low, on the one hand, the first pin 11 can output a low-level fault signal; on the other hand, the input terminal of the braking unit 16 becomes low, the braking unit 16 starts working and outputs a braking signal. Utilizing the circuit's rapid response capability to electrical signals, this invention can process fault events almost simultaneously with their occurrence, ensuring both processing speed and accuracy. Furthermore, as... Figure 1 As shown, the pull-down unit 15 includes an NMOS transistor Q1. The drain of the NMOS transistor Q1 is connected to the first pin, the source is grounded, and the gate is connected to the output terminal of the fault detection unit 17. In practical applications, the specific circuit structure of the pull-down unit 15 can be set as needed, and is not limited to this embodiment.

[0050] like Figure 1 As shown, the input terminal of the fault detection unit 17 is connected to the third pin 13.

[0051] Specifically, in this embodiment, the fault detection unit 17 is connected between the third pin 13 and the circuit pull-down unit 15. After a fault event occurs, the input terminal of the fault detection unit 17 receives a fault indication signal through the third pin 13 and outputs a fault signal, which turns on the circuit pull-down unit 15, thereby pulling the first pin 11 low to ground. The control chip 1 outputs a low-level fault signal through the first pin 11 for subsequent devices to process the fault event. The level of the fault signal output by the fault detection unit 17 is set according to the selected circuit pull-down unit 15.

[0052] It should be noted that in the control chip, when a fault event occurs, the fault detection unit 17 turns on the circuit pull-down unit 15, so the first pin 11 is pulled low and can output a low-level fault signal. At the same time, the input terminal of the braking unit 16 is also pulled low because it is connected to the first pin 11, and the braking unit 16 works and outputs a braking signal. Therefore, the fault signal output and braking signal output of this utility model can be completed simultaneously, and the pin resources of the control chip are saved, adapting to the trend of small-area chips.

[0053] Example 2

[0054] like Figure 2 As shown, this embodiment provides a control chip. The difference between this embodiment and Embodiment 1 is that:

[0055] As shown in Figure 2, the control chip 1 also includes a configuration unit 18 and a fourth pin 19. The input terminal of the configuration unit 18 is connected to the fourth pin 19, and the output terminal is connected to the control terminal of the fault detection unit 17 and the control terminal of the braking unit 16, respectively.

[0056] Specifically, in this embodiment, the configuration unit 18 connects the control terminal of the fault detection unit 17 and the control terminal of the braking unit 16, enabling the control chip 1 to be configured with different operating modes: the control chip 1 is used only to output fault signals, the control chip 1 is used only to output braking signals, and the control chip 1 outputs both fault signals and braking signals. In other words, the control chip 1 can be used flexibly through the configuration unit. Further, as... Figure 2 As shown, configuration unit 18 activates fault detection unit 17 and braking unit 16. After a fault event occurs, the first pin 11 outputs a fault signal for subsequent device processing of the fault event. Simultaneously, the input of braking unit 16 is pulled low, and braking unit 16 outputs a braking signal. Furthermore, as... Figure 3 As shown, configuration unit 18 only activates braking unit 16. The braking trigger signal for braking unit 16 is input to the first pin 11 from an external trigger source. After receiving the braking trigger signal, braking unit 16 outputs a braking signal. Furthermore, as... Figure 4As shown, configuration unit 18 only activates fault detection unit 17. After a fault event occurs, the first pin 11 outputs a fault signal for subsequent device processing of the fault event. In practical applications, the operating mode of control chip 1 can be configured as needed, and is not limited to this embodiment.

[0057] Example 3

[0058] like Figure 5 As shown, this embodiment provides a motor control device, including: a motor 2 and a control chip 1.

[0059] like Figure 5 As shown, the signal input terminal of motor 2 is connected to the second pin 12 of control chip 1, and the signal output terminal is connected to the third pin 13 of control chip 1.

[0060] Specifically, in this embodiment, the signal output terminal of motor 2 is connected to the third pin 13 of control chip 1. When motor 2 malfunctions, it can output a fault indication signal to fault detection unit 17 through the third pin 13. Furthermore, the signal input terminal of motor 2 is connected to the second pin 12 of control chip 1. When braking unit 16 generates a braking signal, motor 2 receives the braking signal through the second pin 12 and performs braking processing. That is, motor 2 can accurately and promptly handle fault events after a fault occurs.

[0061] Specifically, in this embodiment, such as Figure 6 As shown, when the control chip 1 also includes a configuration unit 18, to facilitate user configuration of the control chip 1, the motor control device also includes a computer 3, and the computer 3 is connected to the fourth pin 19 corresponding to the input terminal of the configuration unit 18; wherein, the fourth pin is configured as the input port of the control chip 1, and the computer 3 can input programs to the configuration unit 18 through the fourth pin 19 to configure the configuration unit 18. As an example, the computer 3 and the fourth pin 19 are wirelessly connected and communication is established. In practical applications, the specific connection method between the computer 3 and the fourth pin 19 can be set as needed, and is not limited to this embodiment. Furthermore, the user can select the operating mode of the control chip 1 by inputting different instructions into the computer 3: outputting only fault signals, outputting only braking signals, and outputting both fault signals and braking signals.

[0062] In summary, the control chip of this utility model includes: a first pin, a second pin, a third pin, a braking unit, a circuit pull-up unit, a circuit pull-down unit, and a fault detection unit. The input terminal of the fault detection unit is connected to the third pin, and the output terminal is connected to the control terminal of the circuit pull-down unit. The first terminal of the circuit pull-down unit is connected to the first pin, and the second terminal is grounded. The input terminal of the braking unit is connected to the first pin, and the output terminal is connected to the second pin. The first terminal of the circuit pull-up unit is connected to the pull-up voltage, and the second terminal is connected to the first pin. The motor control device of this utility model includes a motor and a control chip. The motor inputs a fault indication signal to the control chip through the third pin and receives a braking signal through the second pin for braking. By sharing the pin corresponding to the input terminal of the braking unit and the pin corresponding to the output terminal of the fault detection unit (i.e., the first pin), after a fault event occurs, the first pin can both output a fault signal and trigger the braking unit to output a braking signal, enabling the motor to brake in a timely manner and accurately handle fault events. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0063] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A control chip, characterized in that, The control chip includes at least: a first pin, a second pin, a third pin, a braking unit, a circuit pull-up unit, a circuit pull-down unit, and a fault detection unit; The first pin is connected to the input terminal of the braking unit, and the output terminal of the braking unit is connected to the second pin; The first end of the circuit pull-up unit is connected to the pull-up voltage, and the second end is connected to the first pin. The first end of the circuit pull-down unit is connected to the first pin, the second end is grounded, and the control end is connected to the output end of the fault detection unit. The input terminal of the fault detection unit is connected to the third pin.

2. The control chip according to claim 1, characterized in that: The pull-up voltage is 3.3V or 5V.

3. The control chip according to claim 1, characterized in that: The circuit pull-up unit includes a pull-up resistor, the first end of which is connected to the pull-up voltage, and the second end of which is connected to the first pin.

4. The control chip according to claim 3, characterized in that: The sum of the values ​​of the pull-up resistors ranges from 10kΩ to 100kΩ.

5. The control chip according to any one of claims 1-4, characterized in that: The circuit pull-down unit includes an NMOS transistor, the drain of which is connected to the first pin, the source is grounded, and the gate is connected to the output terminal of the fault detection unit.

6. The control chip according to any one of claims 1-4, characterized in that: The control chip also includes a configuration unit and a fourth pin; the input of the configuration unit is connected to the fourth pin, and the output is connected to the control terminal of the fault detection unit and the control terminal of the braking unit, respectively.

7. A motor control device, characterized in that, The motor control device includes at least: a motor and a control chip as described in any one of claims 1-6; The signal input terminal of the motor is connected to the second pin of the control chip, and the signal output terminal is connected to the third pin of the control chip.

8. The motor control device according to claim 7, characterized in that: When the control chip further includes a configuration unit, the motor control device further includes a computer, and the computer is connected to the fourth pin corresponding to the input terminal of the configuration unit.

9. The motor control device according to claim 8, characterized in that: The computer is wirelessly connected to the fourth pin.

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