TWM624328U - High-voltage DC motor electronic control device - Google Patents

Abstract

A high-voltage DC motor electronic control device includes a rectifier circuit unit, a regulation circuit unit and a high-voltage DC motor. The rectifier circuit unit is used to convert a DC high-voltage voltage. The regulation circuit unit includes a pulse wave generation module, a A feedback judgment module, a pulse calculation module and a drive module, the pulse generation module is used to generate a pre-pulse, and the feedback judgment module generates a feedback according to a voltage value of a feedback voltage A determination signal, the pulse computing module generates a post-pulse wave according to the pre-pulse wave and the feedback judgment signal and outputs it to the driving module, and the driving module modulates the DC high voltage voltage by the post-pulse wave The DC regulation output voltage is generated and supplied to the high-voltage DC motor, so as to achieve the purpose of adjusting the rotational speed of the high-voltage DC motor.

Description

High Voltage DC Motor Electronic Control Device

The new model relates to an electric control device, in particular to an electric control device for a high-voltage DC motor.

At present, sewing machines are divided into electronic sewing machines and mechanical sewing machines. The electrical control device of the existing mechanical sewing machine includes a foot controller, a drive circuit electrically connected to an external power source and electrically connected to the foot controller, and an electrical connection For the AC motor of the driving circuit, after the foot controller is stepped on, the driving circuit can output a driving signal and transmit it to the AC motor, and the AC motor operates according to the driving signal.

However, since the electric control device of the existing mechanical sewing machine adopts the AC motor, a relatively complicated circuit is required to adjust the rotation speed of the AC motor. Obviously, the existing mechanical sewing machine still has room for improvement.

Therefore, the purpose of the present invention is to provide a high-voltage DC motor electric control device that can overcome the above shortcomings.

Therefore, the novel high-voltage DC motor electronic control device is suitable for a sewing machine and an AC power supply. The sewing machine includes a needle head that moves in an up-down direction. The high-voltage DC motor electronic control device includes a rectifier circuit unit, a controller, a A control circuit unit and a high-voltage DC motor, the rectifier circuit unit includes an AC power input terminal electrically connected to the AC power source and a DC high-voltage output terminal, the rectifier circuit unit is used to convert a DC power form and the voltage value is substantially greater than 100 The DC high voltage voltage of volts is output to the DC high voltage output terminal. The controller includes a regulation output terminal and is used to generate a control signal and output it to the regulation output terminal. The regulation circuit unit includes a pulse wave generation module. , a feedback judgment module, a pulse wave calculation module and a drive module, the pulse wave generation module has a control input end electrically connected to the control output end and a pre-pulse wave output end, the pulse wave generation module The group generates a pre-pulse wave with an initial duty cycle according to the control signal, and outputs it to the pre-pulse wave output terminal. The feedback judgment module has a feedback judgment input terminal for receiving a feedback voltage and A feedback judgment output terminal, the feedback judgment module generates a corresponding feedback judgment signal according to the voltage value of the feedback voltage, and outputs it at the feedback judgment output terminal, the pulse wave operation module has a power The operation input terminal connected to the feedback judgment output terminal, a pulse wave input terminal electrically connected to the pre-pulse wave output terminal, and a post-pulse wave output terminal, the pulse wave operation module generates according to the pre-pulse wave and the feedback judgment signal. A post-pulse wave with a regulated duty ratio is output to the post-pulse wave output terminal, and the regulated duty ratio corresponds to the voltage value of the feedback voltage, and the driving module has a drive module electrically connected to the DC high voltage A drive power supply end of the output end, a drive input end electrically connected to the post-pulse output end, a feedback voltage output end electrically connected to the feedback judgment input end, a drive voltage output positive end and a drive voltage output negative end, the drive The module modulates the DC high voltage voltage by the post-pulse wave to generate a DC regulated output voltage and output it to the positive terminal of the driving voltage output and the negative terminal of the driving voltage output, and the voltage value of the DC regulated output voltage Corresponding to the voltage value of the feedback voltage, the high-voltage DC motor is electrically connected to the driving voltage output positive terminal and the driving voltage output negative terminal to receive the DC regulation output voltage, and the voltage value of the DC regulation output voltage is substantially greater than 90 volts , the high-voltage direct current motor adjusts the output voltage according to the received direct current to adjust the rotational speed, and makes the needle head cooperate and act in the up and down direction.

The effect of the present invention is that: since the feedback voltage is negatively correlated with the rotational speed of the high-voltage DC motor, the feedback judgment module of the control circuit unit receives the feedback voltage, and the feedback judgment module can The speed of the motor can be judged by the feedback voltage and the feedback judgment signal can be generated, so that the pulse calculation module can generate the post-pulse wave, and the drive module can be matched with the DC high voltage voltage by the post-pulse wave By adjusting the DC regulation output voltage, the high-voltage DC motor can adjust the rotational speed according to the DC regulation output voltage, so as to achieve the purpose of facilitating the adjustment and control of the rotational speed of the high-voltage DC motor.

Referring to FIGS. 1 and 2, an embodiment of the novel high-voltage DC motor electric control device is suitable for a sewing machine (not shown) and an AC power source 9, the sewing machine includes a needle head (not shown in the figure) that moves in an up-down direction ). In this embodiment, the corresponding AC power source 9 is of US standard, and the voltage value is between 100 volts and 120 volts.

This embodiment includes a rectifier circuit unit 1 , a controller 2 , a regulation circuit unit 3 and a high voltage DC motor 8 .

The rectifier circuit unit 1 includes an AC power input terminal 11 electrically connected to the AC power source 9 and a DC high voltage output terminal 12. The rectifier circuit unit 1 is used to convert a DC high voltage in the form of DC power with a voltage value substantially greater than 100 volts. voltage, and output to the DC high voltage output terminal 12 . In this embodiment, the rectifier circuit unit 1 includes a bridge rectifier circuit, a filter circuit and a voltage regulator circuit to perform full-wave rectification to generate the DC high voltage voltage.

The controller 2 includes a control output terminal 21, and the controller 2 is used to generate a control signal and output it to the control output terminal 21. In this embodiment, the controller 2 is a foot control panel. The pedaling force changes the internal resistance of the controller 2 to regulate the control signal.

The regulation circuit unit 3 includes a pulse wave generation module 4 , a feedback judgment module 5 , a pulse wave calculation module 6 and a drive module 7 .

The pulse wave generation module 4 has a regulation input end 41 electrically connected to the regulation output end 21 and a pre-pulse wave output end 42 , and the pulse wave generation module 4 generates a pulse wave having an initial duty cycle according to the control signal The pre-pulse wave is output to the pre-pulse wave output terminal 42 .

The feedback judgment module 5 has a feedback judgment input terminal 51 for receiving a feedback voltage and a feedback judgment output terminal 52. The feedback judgment module 5 generates a phase according to the voltage value of the feedback voltage. The corresponding feedback judgment signal is output to the feedback judgment output terminal 52 .

Specifically, the feedback judgment signal is one of a first feedback judgment signal, a second feedback judgment signal and a third feedback judgment signal, and a voltage value of the feedback voltage defines a A first feedback level, a second feedback level with a voltage value greater than the first feedback level, and a third feedback level with a voltage value greater than the second feedback level, when the feedback The judgment module 5 judges that the feedback voltage is not less than the third feedback level, and generates a third feedback judgment signal. When the feedback judgment module 5 judges that the feedback voltage is not less than the second feedback level is lower than the third feedback level, a second feedback judgment signal is generated. When the feedback judgment module 5 judges that the feedback voltage is not less than the first feedback level and less than the second feedback level level, a first feedback judgment signal is generated. In this embodiment, the feedback determination module 5 is a comparator to determine the voltage value of the feedback voltage.

The pulse wave operation module 6 has an operation input terminal 62 electrically connected to the feedback judgment output terminal 52 , a pulse wave input terminal 61 electrically connected to the pre-pulse wave output terminal 42 , and a post-pulse wave output terminal 63 . The pulse wave computing module 6 generates a rear pulse wave with a regulated duty cycle according to the front pulse wave and the feedback judgment signal and outputs it to the rear pulse wave output terminal 63 , and the regulation duty ratio and the feedback The voltage value corresponds to the voltage. In this embodiment, the pulse wave operation module 6 is a pulse width modulation (PWM) circuit.

Specifically, the pulse wave computing module 6 generates a corresponding pulse wave with the preceding pulse wave according to one of the first feedback judgment signal, the second feedback judgment signal and the third feedback judgment signal and the previous pulse wave. The post-pulse wave of the regulation duty cycle is a pair of first duty cycles corresponding to the first feedback judgment signal, a pair of second duty cycles corresponding to the second feedback judgment signal, and a pair of Corresponding to one of the third duty cycles of the third feedback judgment signal, the third duty cycle is greater than the second duty cycle, and the second duty cycle is greater than the first duty cycle.

In this embodiment, the voltage value of the DC high voltage voltage generated by the rectifier circuit unit 1 is between 100 volts and 120 volts, the first feedback level is between 0.2 volts and 0.35 volts, the second The feedback level is between 0.7 volts and 1.0 volts, the third feedback level is between 1.2 volts and 1.5 volts, the first duty cycle is between 35% and 40%, and the second duty cycle Between 50% and 60%, the third duty cycle is between 65% and 75%.

The driving module 7 has a driving power supply terminal 71 electrically connected to the DC high voltage output terminal 12 , a driving input terminal 72 electrically connected to the rear pulse output terminal 63 , and a feedback input terminal 51 electrically connected to the feedback judgment input terminal 51 . A voltage output terminal 73, a driving voltage output positive terminal 74, a driving voltage output negative terminal 75, a field effect transistor element 76 and a grounded feedback resistor 77, the field effect transistor element 76 has an electrical connection to the driving input A gate terminal 761 of the terminal 72 , a drain terminal 762 electrically connected to the driving voltage output negative terminal 75 , and a source terminal 763 electrically connected to the feedback voltage output terminal 73 and the ungrounded end of the feedback resistor 77 .

The driving module 7 modulates the DC high voltage voltage by the post pulse wave to generate a DC regulation output voltage and output it to the driving voltage output positive terminal 74 and the driving voltage output negative terminal 75, and the DC regulation output voltage The voltage value of the output voltage corresponds to the voltage value of the feedback voltage. In this embodiment, the driving module 7 switches the field effect transistor element 76 between an on mode and an off mode by receiving the post-pulse wave. In the on mode, the drain terminal 762 and the The source terminal 763 is in electrical communication, which means that the drain terminal 762 and the source terminal 763 are substantially equipotential, that is, in a closed state, and in the off mode, the drain terminal 762 and the source terminal 763 are in an equal potential state. In an open circuit, the FET 76 modulates the DC high voltage voltage through the regulation duty cycle of the post-pulse wave to generate the DC regulation output voltage, which defines the single FET 76 in the conduction mode. The sum of the required time for one time and the time required for a single time of the field effect transistor 76 in the off mode is a unit time, and the control duty ratio is the single time of the field effect transistor 76 in the on mode. The ratio of the required time to the unit time, the voltage value of the DC regulation output voltage corresponds to the regulation duty cycle, therefore, by controlling the ratio of the regulation duty cycle to increase or decrease, the DC regulation can be enabled The voltage value of the output voltage corresponds to rise or fall.

The high voltage DC motor 8 is electrically connected to the driving voltage output positive terminal 74 and the driving voltage output negative terminal 75 to receive the DC regulation output voltage. The voltage value of the DC regulation output voltage is substantially greater than 90 volts. The high voltage DC motor 8 receives the The obtained direct current regulates the output voltage to adjust the rotational speed, and together with the needle head cooperates and moves in the up and down direction.

In addition, in the variation of this embodiment, the corresponding AC power source 9 is of European standard, and the voltage value is between 220V and 240V, so the voltage value of the DC high voltage generated by the rectifier circuit unit 1 will correspond to adjustment, while between 220 volts and 240 volts.

Therefore, in the variation of this embodiment, the first feedback level, the second feedback level, the third feedback level, and the first duty defined by the pulse wave computing module 6 ratio, the second duty cycle, and the third duty cycle will also be changed accordingly, the first feedback level is between 1.4 volts and 1.6 volts, and the second feedback level is between 1.7 volts and 1.85 volts , the third feedback level is between 1.9 volts and 2.1 volts, the first duty cycle is between 35% and 40%, the second duty cycle is between 50% and 60%, and the The third duty cycle is between 65% and 75%.

1 and 2, a control method can be described by the present embodiment, and the control method has the following steps:

Step S11 : The DC high voltage voltage is generated by the rectifier circuit unit 1 and output to the DC high voltage output terminal 12 .

Step S12 : the control signal is generated by the controller 2 and output to the control output terminal 21 .

Step S13: A pre-pulse wave having an initial duty cycle is generated by the pulse wave generating module 4, and the pulse wave generating module 4 has a pre-pulse wave output terminal 42 for outputting the pre-pulse wave.

Step S14 : the pulse wave computing module 6 generates a secondary pulse wave with the initial duty cycle according to the pre-pulse wave, and outputs the secondary pulse wave to the post-pulse wave output terminal 63 .

Step S15: The driving module 7 modulates the DC high voltage voltage by the secondary pulse wave to generate a pre-DC regulation output voltage, and the voltage value of the pre-DC regulation output voltage is substantially greater than 90 volts, and is The feedback voltage output terminal 73 provides the feedback voltage.

Specifically, the driving module 7 generates a source current through the FET 76 in the conduction mode and outputs it to the source terminal 763 , and the source current flows through the feedback resistor 77 to provide the feedback voltage.

Step S16: Receive the feedback voltage through the feedback judgment module 5, and generate the corresponding feedback judgment signal according to the voltage value of the feedback voltage, and output the feedback judgment output terminal 52 Judgment signal.

Step S17: The pulse wave operation module 6 receives the front pulse wave and the feedback judgment signal through the pulse wave input terminal 61 and the operation input terminal 62 to generate the back pulse wave, and outputs the back pulse wave at the back pulse wave output terminal. 63 outputs the post-pulse wave, and the regulation duty ratio of the post-pulse wave corresponds to the voltage value of the feedback voltage.

Step S18: the driving module 7 modulates the DC high voltage voltage by the post-pulse wave to generate the DC regulation output voltage, and outputs the output voltage to the driving voltage output positive terminal 74 and the driving voltage output negative terminal 75, The voltage value of the DC regulation output voltage corresponds to the voltage value of the feedback voltage, and the voltage value of the DC regulation output voltage is substantially greater than 90 volts.

Step S19: Receive the DC regulation output voltage by the high-voltage DC motor 8, and adjust the rotational speed according to the received DC regulation output voltage, so that the needle head cooperates and moves in the up and down direction.

To sum up, since the feedback voltage is negatively correlated with the rotational speed of the high-voltage DC motor 8 in the electronic control device of the high-voltage DC motor of the present invention, the feedback judgment module 5 of the regulating circuit unit 3 receives the feedback voltage, the feedback judgment module 5 can use the feedback voltage to judge the speed of the motor and generate the feedback judgment signal, so that the pulse wave operation module 6 generates the post-pulse wave, and makes the drive module 7. The DC regulation output voltage is modulated by the post-pulse wave and the DC high voltage voltage, and the high voltage DC motor 8 can adjust the rotational speed according to the DC regulation output voltage.

Furthermore, the novel high-voltage DC motor electronic control device can directly apply and control the high-voltage DC motor 8 without reducing the voltage after converting the alternating current of the AC power source 9 into a direct-current form, which can reduce the power transmission in use. time loss.

Therefore, the purpose of this new model can indeed be achieved.

However, the above are only examples of the present invention, which should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application for this new model and the contents of the patent specification are still within the scope of the present invention. within the scope of this patent.

1: Rectifier circuit unit 11: AC power input terminal 12: DC high voltage output terminal 2: Controller 21: Control output 3: Control circuit unit 4: Pulse generation module 41: Control input 42: Front pulse output terminal 5: Feedback judgment module 51: Feedback judgment input 52: Feedback judgment output 6: Pulse wave operation module 61: Pulse input terminal 62: Operation input terminal 63: Rear pulse output terminal 7: drive module 71: Drive power supply 72: drive input 73: Feedback voltage output terminal 74: Positive terminal of driving voltage output 75: Drive voltage output negative terminal 76: Field effect transistor element 761: Gate extreme 762: Drain extreme 763: Source Extreme 77: Feedback resistor 8: High voltage DC motor 9: AC power S11~S19: Steps

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a schematic block diagram of a circuit of an embodiment of the novel high-voltage DC motor electronic control device; and FIG. 2 is a flow chart of the control method of this embodiment.

1: Rectifier circuit unit

11: AC power input terminal

12: DC high voltage output terminal

2: Controller

21: Control output

3: Control circuit unit

4: Pulse generation module

41: Control input

42: Front pulse output terminal

5: Feedback judgment module

51: Feedback judgment input

52: Feedback judgment output

6: Pulse wave operation module

61: Pulse input terminal

62: Operation input terminal

63: Rear pulse output terminal

7: drive module

71: Drive power supply

72: drive input

73: Feedback voltage output terminal

74: Positive terminal of driving voltage output

75: Drive voltage output negative terminal

76: Field effect transistor element

761: Gate extreme

762: Drain extreme

763: Source Extreme

77: Feedback resistor

8: High voltage DC motor

9: AC power

Claims (7)

A high-voltage DC motor electric control device is suitable for a sewing machine and an AC power source, the sewing machine includes a needle head that moves in an up-down direction, and the high-voltage DC motor electric control device includes: a rectifier circuit unit, including an AC power input terminal electrically connected to the AC power source, and a DC high voltage output terminal, the rectifier circuit unit is used to convert a DC high voltage voltage in the form of DC power and the voltage value is substantially greater than 100 volts, and output at the DC high voltage output terminal; a controller, including a control output terminal, the controller is used for generating a control signal and outputting it at the control output terminal; A control circuit unit, including: A pulse wave generating module has a regulating input terminal electrically connected to the regulating output terminal, and a pre-pulse wave output terminal, the pulse wave generating module generates a pre-pulse wave with an initial duty cycle according to the control signal, and output to the front pulse wave output terminal; A feedback judgment module has a feedback judgment input terminal for receiving a feedback voltage, and a feedback judgment output terminal. The feedback judgment module generates a corresponding voltage value according to the voltage value of the feedback voltage. The feedback judgment signal is output to the feedback judgment output terminal; A pulse wave operation module, which has an operation input terminal electrically connected to the feedback judgment output terminal, a pulse wave input terminal electrically connected to the pre-pulse wave output terminal, and a post-pulse wave output terminal. The pulse wave operation module is based on The pre-pulse wave and the feedback judgment signal generate a post-pulse wave with a regulated duty cycle and output it to the post-pulse output terminal, and the regulated duty cycle corresponds to the voltage value of the feedback voltage; and a driving module, comprising a driving power supply terminal electrically connected to the DC high voltage output terminal, a driving input terminal electrically connected to the post-pulse output terminal, a feedback voltage output terminal electrically connected to the feedback judgment input terminal, and a driving voltage output terminal A positive terminal, and a negative terminal of a driving voltage output, the driving module modulates the DC high voltage voltage by the post-pulse wave, so as to generate a DC regulation output voltage and output the positive terminal of the driving voltage output and the driving voltage output negative terminal, the voltage value of the DC regulation output voltage corresponds to the voltage value of the feedback voltage; and A high-voltage DC motor is electrically connected to the driving voltage output positive terminal and the driving voltage output negative terminal to receive the DC regulation output voltage. The voltage value of the DC regulation output voltage is substantially greater than 90 volts. The high-voltage DC motor is based on the received The DC regulates the output voltage to adjust the rotational speed, and controls the needle to cooperate and act in the up and down direction. The high-voltage DC motor electronic control device according to claim 1, wherein the driving module further has a field effect transistor element and a grounded feedback resistor, and the field effect transistor element has a gate electrically connected to the driving input end The terminal, a drain terminal electrically connected to the negative terminal of the driving voltage output, and a source terminal electrically connected to the feedback voltage output terminal and the non-grounded terminal of the feedback resistor, the driving module receives the post-pulse wave to make the The field effect transistor device is switched between an on mode and an off mode. In the on mode, the drain terminal and the source terminal are in electrical communication, and in the off mode, the drain terminal and the source terminal are in electrical communication. In an open circuit, the field effect transistor modulates the DC high voltage voltage by the regulation duty cycle of the post-pulse wave to generate the DC regulation output voltage, which defines the single time of the field effect transistor in the conduction mode. The sum of the required time and the single required time of the field effect transistor element in the off mode is a unit time, and the control duty cycle is the single required time of the field effect transistor element in the on mode at The proportion of the unit time, the voltage value of the DC regulation output voltage corresponds to the regulation duty cycle. The high-voltage DC motor electronic control device according to claim 1, wherein the feedback judgment module generates the feedback judgment signal according to the feedback voltage, and the feedback judgment signal is a first feedback judgment signal and a first feedback judgment signal. One of two feedback judgment signals and a third feedback judgment signal, and the voltage value of the feedback voltage defines a first feedback level, a first feedback level with a voltage value greater than the first feedback level Two feedback levels, and a third feedback level whose voltage value is greater than the second feedback level, when the feedback judgment module determines that the feedback voltage is not less than the third feedback level, it generates A third feedback judgment signal, when the feedback judgment module judges that the feedback voltage is not less than the second feedback level and less than the third feedback level, a second feedback judgment signal is generated. The feedback judgment module judges that the feedback voltage is not less than the first feedback level and less than the second feedback level, and generates a first feedback judgment signal, and the pulse wave operation module is based on the first feedback level One of the feedback judgment signal, the second feedback judgment signal and the third feedback judgment signal and the front pulse wave correspondingly generate the back pulse wave with the regulation duty ratio, and the regulation duty ratio is A pair of the first duty cycle corresponding to the first feedback judgment signal, a pair of the second duty cycle corresponding to the second feedback judgment signal, and a pair of the third duty cycle corresponding to the third feedback judgment signal. One, the third duty cycle is greater than the second duty cycle, and the second duty cycle is greater than the first duty cycle. The high-voltage DC motor electronic control device of claim 3, wherein the first feedback level is between 0.2 volts and 0.35 volts, the second feedback level is between 0.7 volts and 1.0 volts, and the first feedback level is between 0.7 volts and 1.0 volts. The three feedback levels are between 1.2 volts and 1.5 volts, the first duty cycle is between 35% and 40%, the second duty cycle is between 50% and 60%, and the third duty cycle is between 50% and 60%. The ratio is between 65% and 75%. The high-voltage DC motor electronic control device according to claim 4, wherein the voltage value of the DC high-voltage voltage generated by the rectifier circuit unit is between 100 volts and 120 volts. The high-voltage DC motor electronic control device of claim 3, wherein the first feedback level is between 1.4 volts and 1.6 volts, the second feedback level is between 1.7 volts and 1.85 volts, and the first feedback level is between 1.7 volts and 1.85 volts. The three feedback levels are between 1.9 volts and 2.1 volts, the first duty cycle is between 35% and 40%, the second duty cycle is between 50% and 60%, and the third duty cycle is between 50% and 60%. The ratio is between 65% and 75%. The high-voltage DC motor electronic control device according to claim 6, wherein the voltage value of the DC high-voltage voltage generated by the rectifier circuit unit is between 220 volts and 240 volts.

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