CN110970971B - Power management system for bonding equipment - Google Patents

Abstract

The invention relates to a power management system for bonding equipment, which includes a general control power supply, a PCU module, a PFC module, a UPS module, a switch power supply and a controllable switch module. By adding power factor correction PFC module and emergency backup power supply UPS module, it cooperates with PCU module as the main control center to realize real-time monitoring of the power system. Especially when the main control power supply is cut off, an emergency backup power supply is provided to save various process data urgently. The PFC module equipped at the same time adjusts the phase of voltage and current, so that the load of the power system is purely resistive, which effectively improves the efficiency of power supply energy use. At the same time, the online real-time monitoring function of the PCU module greatly improves the ease of use and maintainability of the system.

Description

A power management system for bonding equipment

technical field

The technical field to which the present invention relates, in particular, relates to a power management system for bonding equipment.

Background technique

The fully automatic wire bonding machine integrates software control, motion control, image algorithm, and high-precision workbench for opto-mechanical and electrical integration automatic equipment. The equipment has built-in high-frequency vibration ultrasonic system and high-voltage ignition system, fast and sensitive wire clamping device, etc. wait. The automatic wire bonding machine is mainly used for wire bonding in the production of light-emitting diodes, SMD surface mount devices, high-power light-emitting diodes, LED digital tubes, semiconductor triodes and some special semiconductor sensors.

The fully automatic wire bonding machine guides the metal leads to perform complex and high-speed movements in three-dimensional space through a chopper to form a variety of special arc shapes that meet the needs of different packaging forms, and quickly bond the chips that have completed the circuit to the lead frame. device of. Its working principle is to use high-voltage electric sparks to make the end of the gold wire into a spherical shape, and then heat the gold wire and the solder joint with ultrasonic waves at the same time to deform the contact surface and destroy the oxide film on the interface to activate it. The ball bonding is completed on the substrate, and the pressure welding is completed on the substrate of the package, thereby completing the connection between the chip and the package. In order to ensure that there is no interconnection short circuit between gold wires and gold wire disconnection caused by different expansion coefficients of plastic sealants, high-speed wire bonding equipment also puts forward higher requirements for the consistency of wire arc and tension control.

To sum up, the wire bonding machine is an optical-mechanical-electrical integration device with high reliability. Its internal process modules usually work under very harsh working conditions, which not only has a wide working range in the global scope, but also local Regions require extremely fine precision. The Z-axis drive related to the process must not only ensure the maximum thrust and acceleration when starting and stopping, but also high speed and stability in the running process. At the same time, it must ensure that the closed-loop position based on encoder signal feedback is switched to The fast switching without impact when the force loop is closed-loop based on the feedback of the force sensor, and the application of the welding force in grams during welding, which means that the current flowing through the Z-axis motor will quickly switch from the ampere level to tens of mA level. The ignition device related to the process takes power from the power supply and instantly boosts the voltage to 6000V to break down the air, and then applies a milliampere-level current to melt the metal wire into a continuous gold ball. The ultrasonic device related to the process will generate milliampere-level current according to the preset plan to drive the transducing rod to generate micron-level high-frequency vibration to remove the oxide layer on the surface of the material. The XY positioning table, which is closely related to arc forming, adopts a pulse width modulation drive scheme, and the output stage adopts a high-current high-speed switching tube. Usually, the bus voltage will work at 400V, the instantaneous peak current will reach 40A, and the current PWM frequency is as high as 32K.

The above-mentioned electrical modules related to the wire bonding process must not only have a wide working range in the global scope, but also require extremely fine precision in the local area, and need to be equipped with a stable power supply system. Domestic equipment manufacturers usually use a ready-made switching power supply with a simple start-stop control circuit. On the one hand, due to the existence of large inertial loads and the lack of PFC, the power energy usage efficiency of the whole system is not high. On the other hand, this simple system does not have online detection and intelligent diagnosis functions, and cannot intelligently manage the power system. Improve on this.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a power management system for bonding equipment, which can improve the efficiency of the power supply energy of the whole machine, and at the same time, the built-in intelligent monitoring greatly improves the ease of use and maintainability of the system The advantages.

Above-mentioned purpose of the invention of the present invention is achieved through the following technical solutions:

A power management system for bonding equipment,

include:

Master control power supply: coupled to the mains;

PCU module: coupled to the master control power supply and used for detecting input commands and outputting control commands according to the input commands;

Switching power supply module: supply power for various electrical loads in the bonding equipment;

PFC module: coupled to the master control power supply and the switching power supply module to deliver the adjusted purely resistive input power to the switching power supply module;

Power distribution board: coupled to the switching power supply module and distributes the required power for various loads of the bonding equipment, and feeds back the voltage of the switching power supply module to the PCU module;

UPS module: respectively coupled with the main control power supply and the PCU module and supplies power to the loads in the PCU module and bonding equipment respectively when the main control power supply is powered off, and is controlled by the PCU module to send out according to the PCU module command to power off or start;

Controllable switch module: coupled to the PFC module and the switching power supply module, and controlled by the PCU module for switching control of the switching power supply module;

The UPS module automatically supplies power to the PCU module and the load when it detects that the main control power supply is out of power. The PCU module detects this situation and sends an error signal to the load, and the load automatically saves the internal power supply when receiving the error signal. After receiving the data, the power is cut off and a shutdown signal is sent. When receiving the shutdown signal, the PCU module sends a power-off instruction to the UPS module to make the UPS module power off.

By adopting the above technical solution, firstly, the PCU module is located in the control center of the system, accepts the start-stop control command, detects the start-up, stop and emergency stop command input of the power supply, and completes the start-stop control of the bonding equipment power supply. The DC output of the switching power supply module is distributed to the power distribution board to provide different DC power supplies for the wire bonding machine. By arranging the controllable switch module behind the PFC module, the input of the switching power supply module can be quickly cut off after the controllable switch module receives the command signal sent by the PCU. At the same time, the PCU module will also collect the real-time voltage of each switching power supply module of the power distribution board in real time for monitoring. That is, when the main control power supply fails, the UPS module will automatically start the power supply to the PCU module and the load, and the PCU module will send an error signal to the load when detecting this situation. After the load receives the error signal, it starts the function of automatically saving the internal data, so that the data in the program is not easy to lose. After the load saves the internal data, it sends a shutdown signal, and the PCU module sends an instruction to the UPS after receiving the shutdown signal, so that the UPS Cut off the power to save its own electric energy and reduce the waste of electric energy. The PFC module can be used for non-sinusoidal current waveform distortion, forcing the AC line current to track the instantaneous change trajectory of the voltage waveform, and keeping the current and voltage in the same phase, so that the system is a purely resistive technology to solve the problem of using motors on the wire bonding machine The non-resistive load of the executive parts brings the problem of different phases of the supply voltage and current, which improves the utilization rate of electric energy.

The present invention is further configured as follows: the load includes an industrial computer, and the industrial computer automatically saves internal data when receiving an error signal from the PCU and automatically shuts down after the automatic data saving is completed.

By adopting the above technical scheme, the industrial computer controls the wire bonding machine according to the specified time sequence under normal conditions, and provides emergency power supply to the industrial computer when the mains power is cut off by equipped with a backup power supply UPS module, so that the industrial computer has enough time to save Data, reduce the damage caused by sudden power failure to the industrial computer.

The present invention further provides that: the PCU module is coupled with a start button, a stop button and an emergency button for controlling the start and stop of the power supply circuit of the system.

By adopting the above technical solution, the user's input request, such as start, stop and emergency stop, is accepted through the start and stop button. The shutdown of the power supply system can be controlled according to the needs of the system and users. It can also control the start and reset of the industrial computer according to the needs of the system and users, and detect the status feedback of the start and stop of the industrial computer in real time.

The present invention is further set as: a mains power inlet module is coupled between the main control power supply and the mains to filter the mains.

By adopting the above technical solution, by setting the commercial power inlet module to filter the commercial power, the ripple in the commercial power voltage is removed so that the main control power supply contains less clutter.

The present invention is further set as: the PCU module includes a CPU processor, a main switch driver coupled to the mains inlet module, an inlet power supply circuit, a UPS power supply circuit coupled to the UPS module, and the UPS The module is electrically connected to the UPS command interface, the industrial computer control circuit connected to the industrial computer, the switch control circuit coupled to the controllable switch module, the ADC interface coupled to the power distribution board, and the The start-stop interface unit coupled with the start-stop button, the drive of the master switch sends an error signal when it detects that the master control power supply is out of power, the control circuit of the industrial computer detects the working state of the industrial computer and when the When the industrial computer is closed, the industrial computer feeds back a shutdown signal to the control circuit of the industrial computer, and at the same time, when the control circuit of the industrial computer receives the shutdown signal, the CPU processor sends instructions to the UPS command interface to control The switch operation of the UPS module, the switch control circuit sends an instruction to the controllable switch module so that the controllable switch module disconnects the electrical connection between the PFC module and the switching power supply module, and the ADC The interface detects the working status of the switching power supply in real time.

By adopting the above technical solution, the CPU processor processes various signals received by the PCU module, the optocoupler input interface is used to receive the status feedback of various modules, and the photorelay output interface is used to output instructions to control various peripheral modules , The ADC interface is used to monitor the real-time voltage status of the power distribution board. Even in the case of a power failure of the master control power supply, the PCU module and the industrial computer remain online due to the existence of the UPS module. The PCU module can detect the situation of the main control power supply at the first time. After the PCU module receives the information that the main control power supply is out of power, it sends an error signal to the industrial computer, so that the industrial computer saves the data and shuts down and sends a message to the control circuit of the industrial computer. Turn off the signal, then the CPU processor controls the UPS command interface to send the shutdown signal to the UPS module, so that the UPS module is turned off to save power; the CPU processor controls the switch control circuit to transmit the error signal to the controllable switch module so that the controllable switch module cuts off Electrical connection to the power distribution board.

The present invention is further configured as follows: the control circuit of the industrial computer includes a first photorelay and a magnetically isolated serial port, and the industrial computer is provided with a startup interface, a reset interface, a serial port, the startup interface and the reset interface are respectively connected to the first A photorelay is coupled, and the magnetic isolation serial port is connected with the serial port unit.

By adopting the above technical solution, the PUC module sends a start or reset command to the industrial computer through the first photorelay, and completes the switch or reset operation of the industrial computer. The serial port communication is used for the communication between the industrial computer and the PCU module, sending control commands and feedback status information. Magnetically isolated serial ports reduce electrical interference due to their electrical isolation from each other.

In the present invention, it is further set that: the UPS command interface includes a second photorelay, and the UPS module is provided with a startup port and a reset port, and the startup port and reset port are respectively coupled to the second photorelay.

By adopting the above technical solution, the second photorelay receives instructions from the CPU processor, and controls the UPS module through the start port and the reset port.

The present invention further provides that: the mains power inlet module includes an EMI filter circuit for filtering the mains power, a fuse coupled to the EMI filter circuit, and a main switch coupled to the main switch drive.

By adopting the above technical solution, EMI filtering can attenuate radio frequency energy in the stop band range, leaving no attenuation or little attenuation of power frequency, so that the current loss after filtering is less, and the insurance is set in the power-off entrance module In order to protect the circuit from being burned out, the main switch driver can control the action of the main switch, so that the PCU module can know the voltage situation of the mains inlet module in time.

The present invention is further provided that: the inlet power supply circuit includes a relay.

By adopting the above technical solution, the relay has an automatic switching element with an isolation function, and protects the wiring circuit between the mains inlet module and the PCU module.

In summary, the beneficial technical effects of the present invention are:

By adding a power factor correction PFC module and an emergency backup power supply UPS module, together with a PCU module with intelligent monitoring and online diagnosis, the ease of use and maintainability of the bonding equipment is greatly improved, and the efficiency of power supply energy is also improved. Effective promotion. UPS realizes that the industrial computer can realize emergency storage when the power is cut off, so that various process data in the industrial computer can be effectively protected.

Description of drawings

Fig. 1 is a block diagram of the power management system of the present invention;

Fig. 2 is a block diagram of the PCU module in the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to FIG. 1 , it is a power management system for bonding equipment disclosed in the present invention, including a master control power supply coupled to the mains, coupled to the master control power supply and used for detecting input commands and according to the input The PCU module for command output control commands, the switching power supply module for supplying power to various electrical loads in the bonding equipment, and the input power supply (this The current and voltage of the input power supply reflect a purely resistive state) are sent to the PFC module of the switching power supply module, coupled to the switching power supply module and distribute the required power for various loads of the bonding equipment and feed back the voltage of the switching power supply module To the power distribution board of the PCU module, respectively coupled with the general control power supply and the PCU module, and supply power to the PCU module and the load in the bonding equipment when the general control power supply is powered off (power off) And controlled by the PCU module to power off or start the UPS module according to the instructions sent by the PCU module, coupled to the PFC module and the switching power supply module, and controlled by the PCU module for switching control of the switching power supply module Controllable switch module.

When the UPS module receives an error signal, it supplies power to the PCU module and the load. When the PCU module detects that the main control power supply is out of power, it sends an error signal to notify the load. , the PUC module sends a power-off instruction to the UPS module to make the UPS module power off when receiving the shutdown signal. The PFC module improves the utilization rate of power by correcting the current and voltage of the master control power supply.

The load includes an industrial computer and a display, and the industrial computer automatically saves internal data when receiving an error signal from the PCU and automatically shuts down after completing the automatic data saving.

In this embodiment, the industrial computer and the display form the topmost control center. The industrial computer runs the wire bonding program under normal conditions. communicate with each other. When the industrial computer receives an error signal from the PCU module, it first automatically saves the relevant internal process parameters, then shuts down and sends a shutdown signal.

The PCU module (power control module) includes a CPU processor, a UPS power supply circuit coupled to the UPS module, a UPS command interface coupled to the UPS module to detect and control the UPS module and send instructions to the UPS module, and coupled to an industrial computer The industrial computer control circuit that receives the closing signal and transmits instructions to the industrial computer is coupled to the ADC interface of the power distribution board, and is coupled to the inlet power circuit of the master control power supply.

The UPS module will provide emergency backup power for the PCU and the industrial computer when the main control power supply fails. The PCU module will send an error signal to the industrial computer when it detects this error state. The program saves the process parameters stored in the industrial computer and then shuts down and sends a power system shutdown signal to the PCU. The CPU processor controls the UPS command interface to send a shutdown signal to the UPS module to shut down the UPS to save the power of the UPS module. Protection against power errors of the wire bonding machine during power on.

The PCU module is coupled with a start-stop button. The PCU module is provided with a start-stop port. The start-stop button is provided with a start-stop interface. The start-stop port is connected to the start-stop interface. The stop port sends the start-stop command, and the CPU processor controls the actions of various switches when receiving the command sent by the start-stop button, so as to realize the opening and closing of the power management system. Through the start-stop interface or the user's input request, such as start, stop and emergency stop, etc., it can control the on and off of the UPS module, control the start and reset of the industrial computer, and turn on and off the switching power supply module according to the needs of the system and users. with off.

Referring to FIG. 1 and FIG. 2 , a startup port and a reset port are provided in the UPS module, and the UPS command interface includes a second photorelay coupled to the startup port and the reset port respectively. When the second photorelay receives the command signal sent by the CPU processor, it controls the start and reset functions of the UPS module by controlling the start or reset port.

The interface circuit of the PCU module includes a first photorelay and a magnetically isolated serial port. The industrial computer is provided with a startup interface, a reset interface, and a serial port. The first photorelay is respectively coupled to the startup unit and the reset unit to send startup or reset to the industrial computer. Instructions, the magnetically isolated serial port is coupled to the serial port for instruction distribution (that is, issuing instructions) and status information feedback.

A mains inlet module for filtering the mains is connected between the mains and the main control power supply. The mains inlet module filters out the ripples in the mains.

The mains inlet module includes an EMI filter connected to the mains, a 20A fuse connected to the EMI filter, and a main switch connected to the fuse. Attenuation or very little attenuation, so that the current loss after filtering is less, a fuse is set in the power-off entrance module to protect the circuit from being burned out, and the main switch is connected to the main control power supply to control the mains entrance On-off between the module and the master control power supply.

The PCU module is equipped with a main switch drive, which is connected with the main switch to drive the main switch to realize the main switch of the power supply of the bonding equipment.

In this embodiment, there are several switching power supplies with different voltages on the power distribution board. In this embodiment, a 24V DC switching power supply, a 36V DC switching power supply, a 48V DC switching power supply, and a 400V DC switching power supply are used as examples for illustration.

The PCU module is provided with a switch control circuit, and the controllable switch module is provided with a switch interface. In this embodiment, the switch interface is an optically isolated AC switch. The CPU processor controls the switch control circuit to send instructions to the switch interface so that the controllable switch module cuts off the electrical connection between the controllable switch module and the PFC, and realizes the switching operation of one of the switching power supplies.

There is an ADC interface on the PCU module, and a power supply voltage detection port is provided on the power distribution board. The power supply voltage detection port is coupled to the ADC interface. The ADC interface receives information from the power supply voltage detection port. Analog/digital conversion, so that the CPU processor can identify it, so as to realize the real-time monitoring of the switching power supply voltage by the PCU module.

There is an EMC grounding loop on the power distribution board, so that all switching power supplies can be concentrated on the power distribution board for common ground, improving the EMC performance of the system.

The operating conditions and principles of this embodiment are:

First of all, the PCU accepts the user's input request through the start-stop button, such as start, stop and emergency stop. According to the needs of the system and users, it can control the whole power management system or switch operation of a certain module. At the same time, the opening and reset of the industrial computer is also completed. At the same time, the PCU module collects and monitors the real-time voltage of each switching power supply from the power distribution board in real time, so that the staff can monitor in real time.

Equipped with a PFC module, the PFC module corrects the current and voltage of the main control power supply to keep the current and voltage in the same phase, making the system a purely resistive technology and improving the utilization of power; by adding a controllable power supply after the PFC module The switch module can quickly open or cut off the electrical connection between the controllable switch module and the switching power supply, so as to realize the switching operation of the power supply of a certain module.

When the main control power supply loses power, the UPS module provides backup power to the industrial computer and the UPS module, so that the industrial computer remains in a charged state before shutting down, so that the industrial computer and the PCU module can complete the relevant power-off protection work. The PCU module sends an error signal to inform the industrial computer. After receiving the error message, the program of the industrial computer will save the key process parameters in the key program and automatically complete the shutdown of the industrial computer and send a shutdown signal, so that the data in the industrial computer is not easily lost. ;The industrial computer control circuit of the PCU module detects the power voltage shutdown signal brought by the automatic shutdown of the industrial computer at the same time. Once the industrial computer shutdown is completed, the UPS command interface in the PCU module will issue an instruction to shut down the UPS module to save the power of the UPS module. , to complete the orderly protection of a power failure.

The embodiments of this specific implementation mode are all preferred embodiments of the present invention, and do not limit the scope of protection of the present invention accordingly. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered by the present invention. within the protection scope of the present invention.

Claims (8)

1. A power management system for bonding equipment, characterized in that: include: Master control power supply: coupled to the mains; PCU module: coupled to the master control power supply and used for detecting input commands and outputting control commands according to the input commands; Switching power supply module: supply power for various electrical loads in the bonding equipment; PFC module: coupled to the master control power supply and the switching power supply module to deliver the adjusted purely resistive input power to the switching power supply module; Power distribution board: coupled to the switching power supply module and distributes the required power for various loads of the bonding equipment, and feeds back the voltage of the switching power supply module to the PCU module; UPS module: respectively coupled with the main control power supply and the PCU module and supplies power to the loads in the PCU module and bonding equipment respectively when the main control power supply is powered off, and is controlled by the PCU module to send out according to the PCU module command to power off or start; Controllable switch module: coupled to the PFC module and the switching power supply module, and controlled by the PCU module for switching control of the switching power supply module; The UPS module automatically supplies power to the PCU module and the load when it detects that the main control power supply is out of power. The PCU module detects this situation and sends an error signal to the load, and the load automatically saves the internal power supply when receiving the error signal. Power off after the data and send a shutdown signal, the PCU module sends a power-off instruction to the UPS module when receiving the shutdown signal so that the UPS module is powered off, and the load includes an industrial computer, The PCU module includes a CPU processor, a master switch driver coupled to the utility power inlet module, an inlet power circuit, a UPS power circuit coupled to the UPS module, and a UPS command electrically connected to the UPS module. interface, the industrial computer control circuit connected with the industrial computer, the switch control circuit coupled with the controllable switch module, the ADC interface coupled with the power distribution board, the start-stop button coupled with the stop the interface unit, the main switch driver sends an error signal when detecting that the main control power supply is out of power, the control circuit of the industrial computer detects the working state of the industrial computer and when the industrial computer is turned off, the The industrial computer feeds back a shutdown signal to the control circuit of the industrial computer, and at the same time, when the control circuit of the industrial computer receives the shutdown signal, the CPU processor sends an instruction to the UPS command interface to control the switching operation of the UPS module, The switch control circuit sends an instruction to the controllable switch module so that the controllable switch module disconnects the electrical connection between the PFC module and the switching power supply module, and the ADC interface controls the operation of the switching power supply status in real time. 2. A power management system for bonding equipment according to claim 1, wherein the industrial computer automatically saves internal data when receiving the error signal sent by the PCU and after completing the automatic data saving Automatic shut-down. 3 . The power management system for bonding equipment according to claim 2 , wherein a start button, a stop button and an emergency button for controlling the start and stop of the power supply circuit of the system are coupled to the PCU module. 4 . 4 . The power management system for bonding equipment according to claim 3 , wherein a mains power inlet module is coupled between the main control power supply and the mains power to filter the mains power. 5. A power management system for bonding equipment according to claim 4, characterized in that: said industrial computer control circuit includes a first photorelay, a magnetically isolated serial port, and said industrial computer is provided with a startup interface, reset The interface, the serial port, the startup interface and the reset interface are respectively coupled to the first photorelay, and the magnetically isolated serial port is connected to the serial port unit. 6. A power management system for bonding equipment according to claim 4, characterized in that: said UPS command interface comprises a second photorelay, said UPS module is provided with a start port and a reset port, said The start port and the reset port are respectively coupled to the second photorelay. 7. A power management system for bonding equipment according to claim 1, wherein the utility power inlet module includes an EMI filter circuit for filtering the utility power, and an EMI filter circuit coupled to the EMI filter circuit. The fuse and the main switch coupled to the main switch drive. 8. The power management system for bonding equipment according to claim 4, wherein the inlet power circuit includes a relay.

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