Single-phase AC input adaptive motor controller with zero line and live line identification

Abstract

The utility model provides a single-phase AC input adaptive motor controller with zero and live wire identification, which comprises a peak FU68xx single-chip microcomputer module, an auxiliary power supply circuit, a zero and live wire detection circuit, an AC voltage detection circuit, a rectifier bridge voltage doubling circuit, a bus voltage detection circuit, a relay circuit, an input filter circuit and a motor driving circuit. Through a null line and live line detection circuit, a relay is used for replacing a jumper wire, and software detection and control logic are used for realizing automatic adaptation of the motor driver when 110V alternating current or 220V alternating current is input, and meanwhile, a controller is protected from being damaged when misoperation of reverse connection of a null line and a live line occurs to a user.

Description

Technical Field

[0001] This utility model relates to the field of AC motor drive control technology, and in particular to a single-phase AC input adaptive motor controller with live and neutral wire identification. Background Technology

[0002] In a single-phase AC input permanent magnet synchronous motor control system, to ensure consistent efficiency under 110V and 220V AC input, the bus voltage must be the same. Traditional solutions include the following two approaches:

[0003] 1. Active power factor correction (APFC) technology is adopted to keep the bus voltage at around 380VDC regardless of whether the AC input is 110V or 220V. This solution has many advantages, such as improving the power factor on the grid side, reducing line losses, improving efficiency, and reducing grid harmonic pollution. However, this solution has high material costs, large size, and complex control technology, and is more suitable for high-power applications.

[0004] II. Achieving a bus voltage of 310VDC (rectified voltage at 220V AC input) with a 110V AC input using voltage multiplier technology is typically accomplished by pre-installing jumpers in the schematic design. Depending on the customer's technical requirements (110VAC or 220VAC input), the jumper can be soldered during production. A single PCB can accommodate both voltage inputs. However, due to differences in the hardware BOM, the final product needs clear voltage differentiation markings to prevent user confusion and safety hazards. Even if the customer correctly distinguishes between 110VAC and 220VAC products, user error in reversing the live and neutral wires at 110VAC can still cause the voltage multiplier circuit to fail, damaging the controller. This solution is primarily suitable for low-power applications or applications where power factor is not critical. Utility Model Content

[0005] To solve the above problems, this utility model provides a single-phase AC input adaptive motor controller with live and neutral wire identification, including a Peak FU68xx microcontroller module, an auxiliary power supply circuit, a live and neutral wire detection circuit, an AC voltage detection circuit, a rectifier bridge voltage multiplier circuit, a bus voltage detection circuit, a relay circuit, an input filter circuit, and a motor drive circuit.

[0006] The Peak FU68xx microcontroller module is the control center of the controller. It is configured with detection and control logic through software programming. It is used to call up the corresponding internal operation program according to the input instructions and detection signals, and output various circuit control signals after processing, so that the motor can automatically complete the program operation process.

[0007] The auxiliary power supply circuit is used to transform, rectify, filter and regulate the input 220V or 110V AC power into a stable low-voltage DC power, which is then supplied to the Peak FU68xx microcontroller module and its peripheral control circuit.

[0008] The neutral and live wire detection circuit is used to detect the electrical characteristics between the neutral wire ACN and the live wire ACL of the AC input and the ground. It outputs a signal through resistor voltage division and optocoupler isolation, so that the microcontroller can determine whether the wiring sequence of the neutral wire ACN and the live wire ACL is correct.

[0009] The AC voltage detection circuit is used to detect whether the input AC voltage is 110V or 220V, and outputs an AC detection signal to the Peak FU68xx microcontroller module.

[0010] The rectifier bridge voltage multiplier circuit is used to rectify the input AC power into DC power.

[0011] The bus voltage detection circuit is used to reduce the high voltage signal of the bus to a signal that can be safely acquired by a single-chip microcomputer by resistor voltage division, thereby determining whether the bus voltage meets the motor drive requirements.

[0012] The relay circuit is used as a contactless switch to control the working state of the rectifier bridge voltage multiplier circuit under the control of the Peak FU68xx microcontroller module.

[0013] The input filtering circuit is used to filter the input AC power.

[0014] The motor drive circuit is used to drive the motor to operate normally under the control of the Peak FU68xx microcontroller module.

[0015] The advantages of this utility model over the prior art are as follows:

[0016] 1. It can achieve adaptive application of 110VAC or 220VAC, and users do not need to distinguish the usage conditions. It can be used directly and can be sold and used in different regions around the world.

[0017] 2. It can identify live and neutral wires to prevent damage to the controller caused by incorrect wiring sequence.

[0018] 3. Compared to active power factor correction (APFC) circuits, APFC circuits are simpler, have a more cost-effective overall component cost, and are more competitive.

[0019] It should be understood that the content described in the foregoing description of the utility model is not intended to limit the key or essential features of the embodiments of the present utility model, nor is it intended to limit the scope of the present utility model. Other features of the present utility model will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This disclosure provides a circuit schematic diagram of a single-phase AC input adaptive motor controller with live / neutral wire identification.

[0022] Figure 2 This disclosure provides a flowchart of the operation of a single-phase AC input adaptive motor controller with live and neutral wire identification. Detailed Implementation

[0023] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0024] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0025] like Figure 1 As shown, this disclosure provides a single-phase AC input adaptive motor controller with live / neutral wire identification, including a Peak FU68xx microcontroller module, an auxiliary power supply circuit, a live / neutral wire detection circuit, an AC voltage detection circuit, a rectifier bridge voltage multiplier circuit, a bus voltage detection circuit, a relay circuit, an input filter circuit, and a motor drive circuit.

[0026] The PeakTech FU68xx microcontroller module is the program control center, mainly consisting of a power supply section (LDO), an 8051 core, and a motor control core (MCE). Through software programming, it configures detection and control logic to retrieve the corresponding internal operating program based on input commands and detection signals. After processing, it outputs various circuit control signals, enabling the motor to automatically complete the programmed operation process. The controlled objects include relays and motor drive circuits. If the microcontroller itself malfunctions or the information transmitted to it is incorrect, the motor will not function properly.

[0027] The auxiliary power supply circuit is used to transform, rectify, filter, and regulate the input 220V or 110V AC power into a stable low-voltage DC power, which is then supplied to the Peak FU68xx microcontroller module and its peripheral control circuits.

[0028] The live and neutral wire detection circuit is used to detect the electrical characteristics between the neutral wire (ACN) and the live wire (ACL) of the AC input and the ground. It outputs a signal through resistor voltage division and optocoupler isolation, so that the microcontroller can determine whether the wiring sequence of the neutral wire (ACN) and the live wire (ACL) is correct.

[0029] An AC voltage detection circuit is used to detect whether the input AC voltage is 110V or 220V, and outputs an AC detection signal to the Peak FU68xx microcontroller module.

[0030] A rectifier bridge voltage multiplier circuit is used to rectify the input AC power into DC power.

[0031] The bus voltage detection circuit is used to reduce the high voltage signal of the bus to a level that can be safely acquired by a microcontroller through resistor voltage division, thereby determining whether the bus voltage meets the motor drive requirements.

[0032] The relay circuit is used as a contactless switch to control the working state of the rectifier bridge voltage multiplier circuit under the control of the Peak FU68xx microcontroller module. The microcontroller outputs corresponding control signals according to the received AC detection signal and line sequence detection signal to control the conduction of the relay circuit and enable the controller to operate normally.

[0033] The input filter circuit is used to filter the input AC power.

[0034] The motor drive circuit is used to drive the motor to operate normally under the control of the Peak FU68xx microcontroller module. It is an IGBT integrated module.

[0035] The working process of this utility model is as follows:

[0036] (1) After power is applied, according to the characteristics of AC power and rectifier circuit, the bus voltage will cause the auxiliary power supply circuit to work, supply power to the microcontroller and peripheral circuits, and initialize the program.

[0037] (2) The neutral and live wire detection circuit detects whether the neutral and live wire sequence is correct. If the neutral and live wires are connected correctly, the microcontroller will detect a valid signal and continue to execute the next instruction. If the neutral and live wires are connected incorrectly, the microcontroller will not be able to read a valid signal and will terminate the subsequent program instructions and output fault information.

[0038] (3) The AC voltage detection circuit determines whether the AC input voltage is 110V or 220V. If it is 110V input, the microcontroller sends a signal to control the relay to engage, so that the rectifier bridge voltage multiplier circuit works and the bus voltage increases. If it is 220V input, the relay does not need to operate.

[0039] (4) The bus voltage detection circuit determines whether the rectifier bridge voltage multiplier circuit is working properly when AC 110V input is input. If the voltage is lower than DC 250V, the system is determined to be faulty and subsequent operation is interrupted.

[0040] (5) The motor drive circuit reads the motor start command and drives the motor to run.

[0041] The exemplary embodiments of the video signal separation circuit proposed by this utility model have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed by this utility model without exceeding the protection scope of this utility model, which is determined by the appended claims.

Claims

1. A single-phase AC input adaptive motor controller with live / neutral wire identification, characterized in that, It includes the Peak Power FU68xx microcontroller module, auxiliary power supply circuit, live and neutral wire detection circuit, AC voltage detection circuit, rectifier bridge voltage multiplier circuit, bus voltage detection circuit, relay circuit, input filter circuit, and motor drive circuit. The Peak FU68xx microcontroller module is the control center of the controller. It is configured with detection and control logic through software programming. It is used to call up the corresponding internal operation program according to the input instructions and detection signals, and output various circuit control signals after processing, so that the motor can automatically complete the program operation process. The auxiliary power supply circuit is used to transform, rectify, filter and regulate the input 220V or 110V AC power into a stable low-voltage DC power, which is then supplied to the Peak FU68xx microcontroller module and its peripheral control circuit. The neutral and live wire detection circuit is used to detect the electrical characteristics between the neutral wire ACN and the live wire ACL of the AC input and the ground. It outputs a signal through resistor voltage division and optocoupler isolation, so that the microcontroller can determine whether the wiring sequence of the neutral wire ACN and the live wire ACL is correct. The AC voltage detection circuit is used to detect whether the input AC voltage is 110V or 220V, and outputs an AC detection signal to the Peak FU68xx microcontroller module. The rectifier bridge voltage multiplier circuit is used to rectify the input AC power into DC power. The bus voltage detection circuit is used to reduce the high voltage signal of the bus to a signal that can be safely acquired by a single-chip microcomputer by resistor voltage division, thereby determining whether the bus voltage meets the motor drive requirements. The relay circuit is used as a contactless switch to control the working state of the rectifier bridge voltage multiplier circuit under the control of the Peak FU68xx microcontroller module. The input filtering circuit is used to filter the input AC power. The motor drive circuit is used to drive the motor to operate normally under the control of the Peak FU68xx microcontroller module.

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