High-voltage power supply

Abstract

A high-voltage power supply comprises a power conversion circuit used for performing power conversion on the power of an electric signal at an input end; the booster circuit is used for boosting the converted electric signal; the rectifying and filtering circuit is used for rectifying and filtering the boosted electric signal; the current sampling circuit is used for collecting current parameters of the output end; the voltage feedback circuit is used for collecting voltage parameters of the output end; the driving circuit is used for judging whether the output voltage and current of the high-voltage power supply are abnormal or not based on the current parameter and the voltage parameter, and controlling the power conversion circuit to stop working when the output voltage and current of the high-voltage power supply are abnormal; the control circuit is used for sending a starting or stopping instruction to the driving circuit; and the main control module is used for communicating with an upper computer through the communication interface, receiving an output voltage or current adjusting instruction of the upper computer, and adjusting the output voltage or current of the high-voltage power supply through the output voltage and current adjusting module based on the output voltage or current adjusting instruction.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage power supplies, and in particular to a high-voltage module high-voltage power supply with high reliability and adjustable voltage and current. Background Art

[0002] Traditional high-voltage modules are large in size, heavy in weight, and their output power is not adjustable.

[0003] Therefore, there is an urgent need for a portable, output power adjustable, stable and efficient power module. Summary of the invention

[0004] In view of the technical defects and technical drawbacks existing in the prior art, the embodiment of the present invention provides a high voltage power supply that overcomes the above problems or at least partially solves the above problems. The specific solution is as follows:

[0005] A high-voltage power supply comprises a power conversion circuit, a boost circuit, a rectifier and filter circuit, a voltage feedback circuit, a current sampling circuit, a control circuit, a drive circuit, a communication interface and a main control module, wherein an output voltage and current regulating module is provided at the output end of the high-voltage power supply;

[0006] The power conversion circuit is used to convert the power of the electrical signal at the input end of the high-voltage power supply into a first preset power;

[0007] The boost circuit is used to boost the electrical signal converted by the power conversion circuit;

[0008] The rectification and filtering circuit is used to rectify and filter the boosted electrical signal;

[0009] The current sampling circuit is used to collect current parameters at the output end of the high voltage power supply;

[0010] The voltage feedback circuit is used to collect voltage parameters at the output end of the high voltage power supply;

[0011] The driving circuit is used to determine whether the output voltage and current of the high-voltage power supply are abnormal based on the current parameter and the voltage parameter, and when the output voltage and current of the high-voltage power supply are abnormal, control the power conversion circuit to stop working, thereby cutting off the external output of the high-voltage power supply;

[0012] The control circuit is used to send a start or stop instruction to the drive circuit. When the drive circuit receives the stop instruction, the control power conversion circuit stops working. When the drive circuit receives the start instruction, the control power conversion circuit starts working.

[0013] The main control module is used to communicate with the host computer through the communication interface, receive the output voltage or current adjustment instruction of the host computer, and adjust the output voltage or current of the high-voltage power supply through the output voltage and current regulation module based on the output voltage or current adjustment instruction.

[0014] Furthermore, the control circuit is connected to the main control module, and is also used to receive control instructions from the main control module or receive control instructions from a host computer through the main control module, and send a start or stop instruction to the drive circuit based on the control instruction.

[0015] Furthermore, the power conversion circuit includes a power switch tube for controlling its working state, and the drive circuit controls the working state of the power conversion circuit by controlling the opening and closing of the power switch tube. The working state of the power conversion circuit includes stopping working and starting working.

[0016] Furthermore, the high-voltage power supply also includes a current display circuit and a voltage display circuit, which are respectively used to collect voltage and current parameters at the output end of the high-voltage power supply, and transmit them to the main control module, and report them to the host computer through the main control module and the communication interface.

[0017] Furthermore, the high-voltage power supply also includes a constant current signal circuit and a fault signal circuit. The main control module is also used to determine the operating status of the high-voltage power supply based on the voltage and current parameters, including constant current and fault status. The constant current signal circuit displays the constant current status of the high-voltage power supply, and the fault signal circuit is used to display the fault status of the high-voltage power supply.

[0018] Furthermore, the main control module is also used to receive logic instructions from the host computer, and configure high-voltage power supply parameters, read power supply configuration parameters, or read the current operating status of the power supply based on the logic instructions.

[0019] Furthermore, the logic instruction includes a data header, a device address, a function code, a data length, an output voltage, an output current, an alarm threshold voltage, a Xor check, and a terminator;

[0020] The data header includes two bytes, which are fixed to 0XEB or 0X90;

[0021] The device address includes one byte, which is used to represent the device number. If no distinction is required, it is fixed to 0x01, otherwise it is processed according to the corresponding device number;

[0022] The function code includes one byte. If the function code is 0x01, it indicates that the power supply parameters are configured. If the function code is 0x02, it indicates that the power supply configuration parameters are read. If the function code is 0x03, it indicates that the current operating status is read.

[0023] The data length includes one byte and is fixed to 0x0D;

[0024] The output voltage includes two bytes and is only valid when the function code is 0x01. The range is [1B58]-[36B0], corresponding to the voltage range of 7000-14000v;

[0025] The output current includes two bytes and is only valid when the function code is 0x01. The range is

[0064] -[02BC], corresponding to the current range of 100*0.01mA-700*0.01mA;

[0026] The alarm threshold voltage includes two bytes and is only valid when the function code is 0x01. The range is

[0000] -

[1388] , corresponding to the voltage range of 0-5000v;

[0027] The Xor check includes one byte for performing XOR check on other data, wherein the other data includes a data header, a device address, a function code, a data length, an output voltage, an output current and an alarm threshold voltage;

[0028] The terminator includes one byte, which is fixed to 0x0D and represents the end symbol.

[0029] Furthermore, the main control module configures the high-voltage power supply parameters, reads the power supply configuration parameters, or reads the current operating state of the power supply based on the logic instruction, specifically including:

[0030] If the function code in the logic instruction is 0x01, the corresponding parameters of the high voltage power supply are configured based on the output voltage, output current and alarm threshold voltage in the logic instruction;

[0031] If the function code in the logic instruction is 0x02, read the power configuration parameters of the high voltage power supply and report them to the host computer;

[0032] If the function code in the logic instruction is 0x03, the current operating status of the high voltage power supply is read and reported to the host computer.

[0033] The present invention has the following beneficial effects:

[0034] The present invention provides a high-voltage power supply, which adopts push-pull power conversion and voltage doubling circuit internally to convert DC24V input into DC high voltage with stable output, and the output power is 100W. The power supply has a single-channel output, and the single-channel power supply and ground, and the closed-loop circuit are independent, that is, the output has an independent closed-loop circuit. The power supply design adds the judgment of the fault and constant current signal at the output end of the single-channel power supply, and outputs two-channel passive contact signals (the electric contact is closed in case of fault and constant current, and the contact is normally open in normal situation). At the same time, the power supply can set different high-voltage output voltage values, current values, and undervoltage protection values ​​through the communication interface (485 serial port, DB9 connector) to meet the actual needs of customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A framework diagram of a high voltage power supply provided by an embodiment of the present invention;

[0036] Figure 2 A product external view of a high-voltage power supply provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, a high-voltage power supply provided by an embodiment of the present invention includes a power conversion circuit, a boost circuit, a rectifier and filter circuit, a voltage feedback circuit, a current sampling circuit, a control circuit, a drive circuit, a communication interface and a main control module, and an output voltage and current regulating module is provided at the output end of the high-voltage power supply;

[0039] The power conversion circuit is used to convert the power of the electrical signal at the input end of the high-voltage power supply into a first preset power;

[0040] The boost circuit is used to boost the electrical signal converted by the power conversion circuit;

[0041] The rectification and filtering circuit is used to rectify and filter the boosted electrical signal;

[0042] The current sampling circuit is used to collect current parameters at the output end of the high voltage power supply;

[0043] The voltage feedback circuit is used to collect voltage parameters at the output end of the high voltage power supply;

[0044] The driving circuit is used to determine whether the output voltage and current of the high-voltage power supply are abnormal based on the current parameter and the voltage parameter, and when the output voltage and current of the high-voltage power supply are abnormal, control the power conversion circuit to stop working, thereby cutting off the external output of the high-voltage power supply;

[0045] The control circuit is used to send a start or stop instruction to the drive circuit. When the drive circuit receives the stop instruction, the control power conversion circuit stops working. When the drive circuit receives the start instruction, the control power conversion circuit starts working.

[0046] The main control module is used to communicate with the host computer through the communication interface, receive the output voltage or current adjustment instruction of the host computer, and adjust the output voltage or current of the high-voltage power supply through the output voltage and current regulation module based on the output voltage or current adjustment instruction.

[0047] In this embodiment, the electrical signal at the high-voltage power supply input end is a DC24V electrical signal. The present invention adopts a push-pull power conversion and voltage doubling circuit to convert the DC24V input into a stable output DC high voltage with an output power of 100W. At the same time, the power supply can set different high-voltage output voltage values, current values, and under-voltage protection values ​​through the communication interface (485 serial port, DB9 connector) to meet the actual needs of customers.

[0048] The control circuit may be some control switches on a high voltage power supply, and the control circuit sends a start or stop instruction to the drive circuit according to the state of the control switch.

[0049] In some embodiments, the control circuit is connected to the main control module. The control circuit can receive control instructions from the main control module or receive control instructions from a host computer through the main control module, and send a start or stop instruction to the drive circuit based on the control instruction.

[0050] The present invention provides a high-voltage power supply, which can be started and stopped by controlling the high-voltage power supply itself through a control circuit, and can also be started and stopped by receiving a control instruction from a host computer.

[0051] In some embodiments, the power conversion circuit includes a power switch tube for controlling its working state. The driving circuit controls the opening and closing of the power switch tube to control the working state of the power conversion circuit. The working state of the power conversion circuit includes stopping working and starting working.

[0052] In the above embodiment, the power switch tube can control the power conversion circuit to stop working by disconnecting the working voltage of the power conversion circuit, or can control the power conversion circuit to stop working by disconnecting the circuit connection between the power conversion circuit and the high-voltage power supply input terminal.

[0053] In some embodiments, the high-voltage power supply also includes a current display circuit and a voltage display circuit, and the voltage display circuit and the current display circuit are respectively used to collect the voltage and current parameters of the output end of the high-voltage power supply, and transmit them to the main control module, and report them to the host computer through the main control module and the communication interface.

[0054] In some embodiments, the high-voltage power supply also includes a constant current signal circuit and a fault signal circuit. The main control module is also used to determine the operating status of the high-voltage power supply based on the voltage and current parameters, including constant current and fault status. The constant current signal circuit displays the constant current status of the high-voltage power supply, and the fault signal circuit is used to display the fault status of the high-voltage power supply.

[0055] In the above embodiment, the power supply design adds fault and constant current signal judgment on the output end of a single power supply, and outputs two passive contact signals (the contact is closed in case of fault and constant current, and the contact is normally open in normal situation). The main control module judges the operating status of the high-voltage power supply by comparing the collected voltage and current parameters with the preset or pre-configured voltage and current parameters, and can further display the constant current status and fault status of the high-voltage power supply through the constant current signal circuit and the fault signal circuit, wherein the display methods include but are not limited to indicator lights, liquid crystal screens, etc.

[0056] In some embodiments, the main control module is further used to receive logic instructions from a host computer, and configure high-voltage power supply parameters, read power supply configuration parameters, or read the current operating status of the power supply based on the logic instructions.

[0057] The logic instruction includes a data header, a device address, a function code, a data length, an output voltage, an output current, an alarm threshold voltage, a Xor check, and a terminator;

[0058] The data header consists of two bytes, fixed to 0XEB or 0X90

[0059] The device address includes one byte, which is used to represent the device number. If no distinction is required, it is fixed to 0x01, otherwise it is processed according to the corresponding device number;

[0060] The function code includes one byte. If the function code is 0x01, it indicates that the power supply parameters are configured. If the function code is 0x02, it indicates that the power supply configuration parameters are read. If the function code is 0x03, it indicates that the current operating status is read.

[0061] The data length includes one byte and is fixed to 0x0D;

[0062] The output voltage includes two bytes and is only valid when the function code is 0x01. The range is [1B58]-[36B0], corresponding to the voltage range of 7000-14000v;

[0063] The output current includes two bytes and is only valid when the function code is 0x01. The range is

[0064] -[02BC], corresponding to the current range of 100*0.01mA-700*0.01mA;

[0064] The alarm threshold voltage includes two bytes and is only valid when the function code is 0x01. The range is

[0000] -

[1388] , corresponding to the voltage range of 0-5000v;

[0065] The Xor check includes one byte for performing XOR check on other data, wherein the other data includes a data header, a device address, a function code, a data length, an output voltage, an output current and an alarm threshold voltage;

[0066] The terminator includes one byte, which is fixed to 0x0D and represents the end symbol.

[0067] The main control module configures the high-voltage power supply parameters, reads the power supply configuration parameters, or reads the current operating status of the power supply based on the logic instruction, specifically including:

[0068] If the function code in the logic instruction is 0x01, the corresponding parameters of the high voltage power supply are configured based on the output voltage, output current and alarm threshold voltage in the logic instruction;

[0069] If the function code in the logic instruction is 0x02, read the power configuration parameters of the high voltage power supply and report them to the host computer;

[0070] If the function code in the logic instruction is 0x03, the current operating status of the high voltage power supply is read and reported to the host computer.

[0071] In the above embodiment, after the main control module obtains the output voltage and output current in the logic instruction, the output voltage and current adjustment module can make corresponding adjustments to the output voltage and output current according to the output voltage and output current in the logic instruction, and when the stabilized output voltage exceeds the alarm threshold voltage, an alarm is issued through a constant current signal circuit, a fault signal circuit or other alarm circuit.

[0072] like Figure 2 As shown, the present invention also provides a product appearance of a high-voltage power supply, including a shell, and the power conversion circuit, boost circuit, rectifier and filter circuit, voltage feedback circuit, current sampling circuit, control circuit, drive circuit and main control module are all encapsulated in the shell, and the shell is provided with a DB9 communication interface, a low-voltage D24V input interface and high-voltage HV+ and HV- output interfaces.

[0073] The power module is designed with dimensions of only 200*120*70mm (length*width*height). In order to reduce weight, the shell is made of aluminum (which is beneficial to the heat dissipation of the power switch tube). A DB9 communication interface is set on the outside of the product, which can achieve adjustable voltage of 7000-14000DC and current of 7-14mA to meet the different needs of users.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high voltage power supply, characterized in that: It includes a power conversion circuit, a boost circuit, a rectifier and filter circuit, a voltage feedback circuit, a current sampling circuit, a control circuit, a drive circuit, a communication interface and a main control module. The output end of the high-voltage power supply is provided with an output voltage and current regulating module; The power conversion circuit is used to convert the power of the electrical signal at the input end of the high-voltage power supply into a first preset power; The boost circuit is used to boost the electrical signal converted by the power conversion circuit; The rectification and filtering circuit is used to rectify and filter the boosted electrical signal; The current sampling circuit is used to collect current parameters at the output end of the high voltage power supply; The voltage feedback circuit is used to collect voltage parameters at the output end of the high voltage power supply; The driving circuit is used to determine whether the output voltage and current of the high-voltage power supply are abnormal based on the current parameter and the voltage parameter, and when the output voltage and current of the high-voltage power supply are abnormal, control the power conversion circuit to stop working, thereby cutting off the external output of the high-voltage power supply; The control circuit is used to send a start or stop instruction to the drive circuit. When the drive circuit receives the stop instruction, the control power conversion circuit stops working. When the drive circuit receives the start instruction, the control power conversion circuit starts working. The main control module is used to communicate with the host computer through the communication interface, receive the output voltage or current adjustment instruction of the host computer, and adjust the output voltage or current of the high-voltage power supply through the output voltage and current regulation module based on the output voltage or current adjustment instruction.

2. The high voltage power supply according to claim 1, characterized in that: The control circuit is connected to the main control module, and is further used to receive control instructions from the main control module or receive control instructions from a host computer through the main control module, and send a start or stop instruction to the drive circuit based on the control instruction.

3. The high voltage power supply according to claim 1, characterized in that: The power conversion circuit includes a power switch tube for controlling its working state. The drive circuit controls the opening and closing of the power switch tube to control the working state of the power conversion circuit. The working state of the power conversion circuit includes stopping working and starting working.

4. The high voltage power supply according to claim 1, characterized in that: The high-voltage power supply also includes a current display circuit and a voltage display circuit, which are respectively used to collect voltage and current parameters at the output end of the high-voltage power supply, and transmit them to the main control module, and report them to the host computer through the main control module and the communication interface.

5. The high voltage power supply according to claim 4, characterized in that: The high-voltage power supply also includes a constant current signal circuit and a fault signal circuit. The main control module is also used to determine the operating status of the high-voltage power supply based on the voltage and current parameters, including constant current and fault status. The constant current signal circuit displays the constant current status of the high-voltage power supply, and the fault signal circuit is used to display the fault status of the high-voltage power supply.

6. The high voltage power supply according to claim 1, characterized in that: The main control module is also used to receive logic instructions from the host computer, and configure high-voltage power supply parameters, read power supply configuration parameters, or read the current operating status of the power supply based on the logic instructions.

7. The high voltage power supply according to claim 6, characterized in that: The logic instruction includes a data header, a device address, a function code, a data length, an output voltage, an output current, an alarm threshold voltage, a Xor check, and a terminator; The data header includes two bytes, which are fixed to 0XEB or 0X90; The device address includes one byte, which is used to represent the device number. If no distinction is required, it is fixed to 0x01, otherwise it is processed according to the corresponding device number; The function code includes one byte. If the function code is 0x01, it indicates that the power supply parameters are configured. If the function code is 0x02, it indicates that the power supply configuration parameters are read. If the function code is 0x03, it indicates that the current operating status is read. The data length includes one byte and is fixed to 0x0D; The output voltage includes two bytes and is only valid when the function code is 0x01. The range is [1B58]-[36B0], corresponding to the voltage range of 7000-14000v; The output current includes two bytes and is only valid when the function code is 0x01. The range is [0064]-[02BC], corresponding to the current range of 100*0.01mA-700*0.01mA; The alarm threshold voltage includes two bytes and is only valid when the function code is 0x01. The range is [0000]-[1388], corresponding to the voltage range of 0-5000v; The Xor check includes one byte for performing XOR check on other data, wherein the other data includes a data header, a device address, a function code, a data length, an output voltage, an output current and an alarm threshold voltage; The terminator includes one byte, which is fixed to 0x0D and represents the end symbol.

8. The high voltage power supply according to claim 7, characterized in that: The main control module configures the high-voltage power supply parameters, reads the power supply configuration parameters or reads the current operating state of the power supply based on the logic instruction, specifically including: If the function code in the logic instruction is 0x01, the corresponding parameters of the high voltage power supply are configured based on the output voltage, output current and alarm threshold voltage in the logic instruction; If the function code in the logic instruction is 0x02, read the power configuration parameters of the high voltage power supply and report them to the host computer; If the function code in the logic instruction is 0x03, the current operating status of the high voltage power supply is read and reported to the host computer.

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