High-power commercial high-speed blender ice crusher driving circuit

Abstract

The utility model discloses a high-power commercial high-speed blender / ice crusher drive circuit, which relates to the technical field of motor drive circuits, and aims to solve the technical problems, and comprises a control circuit, a drive circuit and a power circuit, an 8051 kernel used for parameter configuration and daily transaction processing and a motor control engine used for hardware to automatically complete motor FOC / BLDC operation control so as to process motor real-time transactions are integrated in the FU6812L2 chip, and an EG3113 grid driving chip of a pre-driving high-power MOS tube and an IGBT tube is adopted in the driving circuit. The EG3113 gate drive chip integrates a logic signal input processing circuit, a dead zone time control circuit, a lockout circuit, a level shift circuit, a pulse filter circuit and an output drive circuit. According to the utility model, the operation stability and accuracy of the motor are improved, the energy consumption and rotation speed fluctuation are reduced, the food material stirring effect is improved, the heat dissipation capability is enhanced, the service life of circuit elements is prolonged, and long-time stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of motor drive circuit technology, and more specifically, to a high-power commercial blender / smoothie machine drive circuit. Background Technology

[0002] In the field of commercial smoothie makers and blenders, the performance of the drive circuit plays a crucial role in the overall operation of the equipment. Traditional drive circuits for smoothie makers and commercial blenders have many shortcomings.

[0003] On the one hand, its control chip has a relatively simple function and cannot efficiently complete tasks such as parameter configuration, daily task processing and complex motor calculation control. This results in poor stability and accuracy of motor operation, making it difficult to flexibly adjust the mixing effect when processing different ingredients, leading to uneven mixing of ingredients and affecting product quality.

[0004] On the other hand, the efficiency of the drive circuit is not high, and the full-load efficiency is low. This not only increases the energy consumption of the equipment and raises the operating cost, but also causes large speed fluctuations. The speed fluctuation rate is usually greater than ±0.3%, which makes the motor prone to jamming and instability during operation, seriously affecting the service life of the equipment. Its mean time between failures is often less than 10,000 hours, and frequent maintenance brings a lot of inconvenience to the business.

[0005] Furthermore, the design of the power circuit is inadequate, failing to provide a stable voltage to the motor and affecting its normal operation. Given these issues, the development of a higher-performance, higher-power drive circuit for commercial blenders / smoothies is urgently needed. Therefore, we propose a high-power drive circuit for commercial blenders / smoothies. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a high-power commercial blender / smoothie machine drive circuit to solve the current technical problems.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-power commercial blender / smoothie machine drive circuit, including a control circuit, a drive circuit, and a power circuit:

[0008] The control circuit uses the FU6812L2 motor drive dedicated chip. The FU6812L2 chip integrates an 8051 core for parameter configuration and daily task processing, and a motor control engine for hardware-automated FOC / BLDC calculation and control of the motor to handle real-time motor tasks.

[0009] The driving circuit uses the EG3113 gate driver chip for pre-driving high-power MOSFETs and IGBTs. The EG3113 gate driver chip integrates a logic signal input processing circuit, a dead-time control circuit, a latching circuit, a level shifting circuit, a pulse filtering circuit, and an output driving circuit.

[0010] The power circuit includes a rectifier and filter module and a power drive circuit. The rectifier and filter module consists of a high-power rectifier bridge and an electrolytic capacitor, and outputs a DC bus voltage of 310V. The power drive circuit uses a high-power IGBT.

[0011] Preferably, it also includes a high-speed control algorithm for controlling the motor torque by measuring and controlling the stator current vector of the motor and controlling the excitation current and torque current of the motor respectively according to the field orientation principle, wherein the high-speed control algorithm adopts multi-resistor sampling.

[0012] Preferably, the system further includes a PCB, a high-voltage drive circuit, and a power supply circuit. The control circuit is electrically connected to the high-voltage drive circuit and the power supply circuit. The control circuit, the power supply circuit, and the drive circuit are located in the lower left, upper, and lower right parts of the PCB, respectively.

[0013] Preferably, it also includes a heat sink, which is made of aluminum alloy through a one-piece cutting process. The heat sink is located on the back of the PCB and is directly connected to the rectifier bridge and IGBT. The PCB is fixed on the heat sink.

[0014] Preferably, the drive circuit has a full-load efficiency greater than 95%, a speed fluctuation rate less than ±0.3%, and a mean time between failures greater than 10,000 hours.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model utilizes the FU6812L2 motor drive chip, which integrates an 8051 core and a motor control engine, as the control circuit. This enables efficient parameter configuration, routine task processing, and automatic hardware-based FOC / BLDC calculation and control of the motor. It accurately handles real-time motor tasks. Combined with the EG3113 gate driver chip pre-driving high-power MOSFETs and IGBTs, and a power circuit consisting of a high-power rectifier bridge and electrolytic capacitors providing a stable 310V DC bus voltage output, this significantly improves the stability and accuracy of motor operation. Simultaneously, the drive circuit achieves a full-load efficiency greater than 95%, effectively reducing energy consumption and saving operating costs compared to traditional drive circuits. The speed fluctuation rate is less than ±0.3%, ensuring smooth motor operation and solving the problems of unstable motor operation, high energy consumption, and poor food mixing effects in traditional drive circuits.

[0017] 2. This utility model also employs a high-speed control algorithm with multi-resistance sampling to measure and control the stator current vector of the motor, and controls the excitation current and torque current of the motor according to the principle of magnetic field orientation, so as to realize the torque control of the motor. It can process different ingredients according to the combination of different mixing time and mixing speed, further improving the diversity and accuracy of the mixing effect of ingredients.

[0018] 3. In this utility model, the heat sink adopts an integral cutting process of aluminum alloy and is directly connected to the rectifier bridge and IGBT, which can dissipate heat more effectively, extend the service life of the rectifier bridge and IGBT, thereby further improving the stability and reliability of the entire drive circuit, ensuring the long-term stable operation of the equipment, and further solving the problem of short service life of equipment due to poor heat dissipation in traditional drive circuits. Attached Figure Description

[0019] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0020] like Figure 1 As shown, this utility model relates to a high-power commercial blender / smoothie machine drive circuit, including a control circuit, a drive circuit, a power circuit, and a high-speed control algorithm:

[0021] The control circuit uses the FU6812L2 motor drive dedicated chip. The FU6812L2 chip integrates an 8051 core and a motor control engine. The 8051 core is used for parameter configuration and daily task processing, while the motor control engine is used to automatically complete the motor FOC / BLDC calculation control and process real-time motor tasks.

[0022] The driving circuit uses the EG3113 gate driver chip, which pre-drives high-power MOSFETs and IGBTs. The EG3113 gate driver chip integrates a logic signal input processing circuit, a dead-time control circuit, a latching circuit, a level shifting circuit, a pulse filtering circuit, and an output driving circuit.

[0023] The power circuit includes a rectifier and filter module and a power drive circuit. The rectifier and filter module consists of a high-power rectifier bridge and an electrolytic capacitor, and outputs a DC bus voltage of 310V. The power drive circuit uses a high-power IGBT.

[0024] In the embodiments of this utility model, the high-speed control algorithm measures and controls the stator current vector of the motor, and controls the excitation current and torque current of the motor respectively according to the principle of magnetic field orientation, so as to achieve control of the motor torque; multi-resistor sampling is adopted to collect two-phase current and total current when the three lower bridge arms are simultaneously turned on and calculate the third-phase current, and realize closed-loop control by combining back electromotive force sampling, and process different ingredients by coordinating different stirring times and stirring speeds.

[0025] In the embodiments of this utility model, the EG3113 gate driver chip has been optimized by carefully matching component parameters and undergoing batch verification.

[0026] In embodiments of this utility model, PCB and EMC design are also included. The control circuit, high-voltage drive circuit, and power supply circuit are strictly separated. The control circuit is located in the lower left part of the PCB, the power supply circuit is located in the upper part, and the drive circuit is located in the lower right part. The heat sink adopts an integral aluminum alloy cutting process, is located on the back of the PCB, and is directly connected to the rectifier bridge and IGBT. The PCB is fixed on the heat sink.

[0027] In embodiments of this utility model, the drive circuit is suitable for high-power commercial food processing equipment such as slush machines and blenders, with a maximum drive power of up to 3000W.

[0028] In the embodiments of this utility model, the drive circuit has a full-load efficiency greater than 95%, a speed fluctuation rate less than ±0.3%, and a mean time between failures (MTBF) greater than 10,000 hours.

[0029] Working Principle: This embodiment provides a high-power commercial blender / smoothie machine drive circuit. During use, the control circuit employs the FU6812L2 motor drive chip. Its integrated 8051 core handles parameter configuration and daily tasks, receiving external operation commands and setting parameters such as motor operating mode and speed. The motor control engine undertakes the crucial task of motor FOC (Field-Oriented Control) / BLDC (Brushless DC Motor) calculation and control, monitoring and processing motor operating status information in real time, and generating precise control signals based on preset parameters and the actual condition of the motor.

[0030] Drive Circuit: The drive circuit is based on the EG3113 gate driver chip, which pre-drives high-power MOSFETs and IGBTs. The integrated logic signal input processing circuit within the EG3113 gate driver chip receives control signals from the control circuit, performs shaping and amplification to ensure signal quality and driving capability. The dead-time control circuit sets an appropriate dead time during power transistor switching to prevent simultaneous conduction of the upper and lower bridge arm power transistors, avoiding short-circuit faults. The latching circuit locks the drive signal output to protect circuit components in abnormal situations (such as overcurrent or overvoltage). The level shifting circuit converts the low-level signal from the control circuit into a high-level signal suitable for driving the power transistors. The pulse filtering circuit filters the drive pulses to reduce electromagnetic interference. Finally, the processed signal drives the high-power IGBT in the power circuit through the output drive circuit, controlling its on / off state, thereby driving the motor.

[0031] Power Circuit: The rectifier and filter module of the power circuit consists of a high-power rectifier bridge and electrolytic capacitors. The high-power rectifier bridge converts the input AC power into DC power, and the electrolytic capacitors filter the rectified DC power, smoothing voltage fluctuations and outputting a stable 310V DC bus voltage, providing a stable power supply for the subsequent power drive circuit and motor. The power drive circuit uses high-power IGBTs. Under the control of the drive circuit, the IGBTs convert DC power into the three-phase AC power required by the motor according to the control signal requirements, driving the motor to rotate.

[0032] High-speed control algorithm: The high-speed control algorithm employs a multi-resistor sampling method. When all three lower bridge arms are simultaneously conducting, it collects two-phase current and total current, and calculates the third-phase current using a specific method. Combined with back EMF sampling, it achieves closed-loop control of the motor. By monitoring current and back EMF in real time, the algorithm can accurately calculate the actual operating state of the motor. Based on the principle of field orientation, it precisely controls the motor's excitation current and torque current, thereby achieving precise control of the motor's torque. In practical applications, based on different combinations of mixing time and speed, this algorithm can adapt to the characteristics of various ingredients, adjusting the motor's torque output to ensure ideal mixing results for different ingredients.

[0033] Overall Collaborative Operation: During equipment operation, the control circuit, drive circuit, and power circuit work closely together. The control circuit generates corresponding control signals based on the user-defined operating mode and parameters, sending them to the drive circuit. The drive circuit processes and amplifies the control signals, then drives the IGBTs in the power circuit, enabling the motor to operate at the predetermined speed and torque. The power circuit provides a stable power supply to the motor, ensuring its normal operation. Simultaneously, a high-speed control algorithm monitors the motor's operating status in real time and feeds it back to the control circuit. The control circuit adjusts the control signals promptly based on this feedback, achieving precise motor control and ensuring stable and efficient operation under various working conditions. Furthermore, the rational layout of the circuit modules on the PCB board, and the direct connection between the heat sink (using an integral aluminum alloy cutting process) and the rectifier bridge and IGBTs, effectively solves the heat dissipation problem, ensuring circuit stability and reliability, and extending the equipment's lifespan.

[0034] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Using a driver chip similar to FU6812L2 and a pre-driver chip similar to EG3113, those skilled in the art can easily understand the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A high-power commercial blender / smoothie drive circuit, characterized in that, Includes control circuits, drive circuits, and power circuits: The control circuit uses the FU6812L2 motor drive dedicated chip. The FU6812L2 chip integrates an 8051 core for parameter configuration and daily task processing, and a motor control engine for hardware-automated FOC / BLDC calculation and control of the motor to handle real-time motor tasks. The driving circuit uses the EG3113 gate driver chip for pre-driving high-power MOSFETs and IGBTs. The EG3113 gate driver chip integrates a logic signal input processing circuit, a dead-time control circuit, a latching circuit, a level shifting circuit, a pulse filtering circuit, and an output driving circuit. The power circuit includes a rectifier and filter module and a power drive circuit. The rectifier and filter module consists of a high-power rectifier bridge and an electrolytic capacitor, and outputs a DC bus voltage of 310V. The power drive circuit uses a high-power IGBT.

2. The driving circuit for a high-power commercial blender / smoothie machine according to claim 1, characterized in that, It also includes a high-speed control algorithm for controlling the motor torque by measuring and controlling the stator current vector of the motor and controlling the excitation current and torque current of the motor respectively according to the field orientation principle. The high-speed control algorithm uses multi-resistor sampling.

3. The driving circuit for a high-power commercial blender / smoothie machine according to claim 1, characterized in that, It also includes a PCB, a high-voltage drive circuit, and a power supply circuit. The control circuit is electrically connected to the high-voltage drive circuit and the power supply circuit. The control circuit, the power supply circuit, and the drive circuit are located in the lower left, upper, and lower right parts of the PCB, respectively.

4. The driving circuit for a high-power commercial blender / smoothie machine according to claim 1, characterized in that, It also includes a heat sink, which is made of aluminum alloy through a one-piece cutting process. The heat sink is located on the back of the PCB and is directly connected to the rectifier bridge and IGBT. The PCB is fixed on the heat sink.

5. The driving circuit for a high-power commercial blender / smoothie machine according to claim 1, characterized in that, The drive circuit has a full-load efficiency greater than 95%, a speed fluctuation rate less than ±0.3%, and a mean time between failures greater than 10,000 hours.

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