CN-224218376-U - Higher harmonic generation equipment capable of testing harmonic resistance of product

Abstract

The utility model relates to the technical field of higher harmonics, and discloses higher harmonic generation equipment capable of testing the harmonic resistance of a product, which comprises a switching power supply circuit module, an operational amplifier circuit module, a signal generator module, a power frequency transformer module and an isolation transformer module; the harmonic generator is beneficial to solving the problem that the harmonic resistance of the product can be tested before the product is put into the market so as to ensure that the product can be safely and reliably used in a severe use environment, and the traditional harmonic generator is often a simple waveform generation circuit, and a waveform with a certain shape and frequency is output through the circuit construction. After the circuit is fixed, the generated waveform and frequency are always fixed, but the utility model has the advantages of diversified output harmonic waveforms and adjustable output frequency, and the maximum bandwidth can reach 100kHZ.

Inventors

• LUO MING
• YANG JIE

Assignees

• 杭州得明电子股份有限公司

Dates

Publication Date

20260508

Application Date

20250423

Claims (6)

1. 1. The utility model provides a can test product harmonic resistance's higher harmonic generation equipment, wherein includes switching power supply circuit module, fortune discharge circuit module, signal generator module, power frequency transformer module and isolation transformer module, switching power supply circuit module with flyback topology's switching power supply output four-way voltage is +40V, -40V, +12V, -12V respectively, fortune discharge circuit module can make signal generator's amplitude amplify, fortune discharge circuit increases voltage according to the multiple, its amplitude is determined by fortune discharge chip's withstand voltage ability, the maximum frequency also is determined by fortune discharge chip's ability, the waveform and the frequency of output are provided by signal amplifier, fortune discharge circuit does not change waveform and the frequency of output, signal generator module, external equipment signal generator is responsible for providing the fortune discharge circuit and provides various different frequencies and waveforms, isolation transformer module is the fortune discharge circuit produces high frequency waveform, go into the commercial power, couple high frequency signal to the vice limit of isolator transformer through the isolator transformer, vice limit and power stack together is provided as the commercial power supply after the power is surveyed to the commercial power.
2. 2. The device for testing the harmonic resistance of the product according to claim 1, wherein the power frequency transformer module is used for outputting the power supply to the load after isolation after the power frequency transformer inputs the power supply, and transmitting the power supply to the high-frequency signal generated by the power transmission circuit after the isolation output.
3. 3. A harmonic generating apparatus for testing product's ability to resist harmonic wave according to claim 2, wherein the circuit is divided into three parts, namely a switching power supply part, an amplifying circuit part and an isolating transformer circuit part.
4. 4. A higher harmonic generation device capable of testing the resistance of a product to harmonics according to claim 3, wherein said switching power supply section outputs four voltages of +40V, -40V, +12V, -12V, respectively, using a flyback topology for providing a voltage source.
5. 5. A higher harmonic generating apparatus capable of testing the resistance of a product to harmonics as set forth in claim 4, wherein said amplifying circuit portion amplifies the amplitude of the voltage using an operational amplifier circuit, the amplifying circuit being capable of determining the amplification factor, the initial amplitude and frequency being provided by a signal amplifier of an external device.
6. 6. The device for testing the harmonic resistance of a product according to claim 5, wherein the isolation transformer circuit part is used for inducing the high-frequency finished waveform generated by the operational amplifier circuit into the commercial power component of the power frequency through the isolation transformer.

Description

Higher harmonic generation equipment capable of testing harmonic resistance of product Technical Field The utility model relates to the technical field of higher harmonics, in particular to higher harmonic generation equipment capable of testing the harmonic resistance of a product. Background With the rise of new energy, various high-frequency synthesized alternating current power supplies (such as photovoltaic, wind power, energy storage and the like) are connected to a power grid, so that the power supply components of the power grid become more and more complex. Meanwhile, the rapid growth of new energy vehicles brings a large number of charging devices to be connected into a power grid, the number of the devices is more and more concentrated, and the potential pollution to the power grid is more and more serious. When the high-frequency harmonic voltage in the local power grid reaches a certain amplitude proportion, threat is brought to electric equipment connected in the same network, and misoperation and even damage of the equipment can be caused. Although national and international standards clearly prescribe harmonic current standards of various electric appliances injected into a power grid when working, as the national product quality supervision system is still to be perfected and part of countries and regions do not pay enough attention to the problem, some bad manufacturers omit input filters or steal materials in the production process in order to reduce the cost, so that the harmonic indexes of the products far exceed relevant limit standards. Therefore, a voltage source device capable of generating higher harmonics to simulate a power grid polluted in reality has been forced. Disclosure of utility model In order to overcome the above-mentioned drawbacks of the prior art, the present utility model provides a higher harmonic generation apparatus capable of testing the resistance of a product to harmonics, so as to solve the above-mentioned problems in the prior art. The utility model provides a high-order harmonic generation device capable of testing the harmonic resistance of a product, which comprises a switching power supply circuit module, an operational amplifier circuit module, a signal generator module, a power frequency transformer module and an isolation transformer module. Preferably, the switching power supply circuit module outputs four paths of voltages of +40V, -40V, +12V and-12V respectively by using a switching power supply of flyback topology. Preferably, the operational amplifier circuit module can amplify the amplitude of the signal generator, the operational amplifier circuit increases the voltage by multiple, the amplitude is determined by the voltage-withstanding capability of the operational amplifier chip, the maximum frequency is also determined by the capability of the operational amplifier chip, the output waveform and frequency are provided by the signal amplifier, and the operational amplifier circuit does not change the output waveform and frequency. Preferably, the signal generator module, the external device signal generator is responsible for providing the original signal to the operational amplifier circuit, and providing various different frequencies and waveforms. Preferably, the isolation transformer module transmits the high-frequency waveform generated by the operational amplifier circuit into the commercial power, the isolation transformer couples the high-frequency signal to the secondary side of the isolation transformer, and the secondary side and the commercial power isolated by the power frequency transformer are overlapped together to serve as a voltage source for providing power for the tested product. Preferably, the power frequency transformer module is used for outputting the commercial power to the load after isolation after the power frequency transformer inputs the commercial power, and transmitting the high-frequency signal generated by the power transmission circuit after isolation output. Preferably, if the circuit is used for distinguishing, the circuit can be divided into three parts, namely a switching power supply part, an amplifying circuit part and an isolating transformer circuit part. Preferably, the switching power supply part outputs four paths of voltages of +40V, -40V, +12V and-12V respectively by using a flyback topology, and is used for providing a voltage source. Preferably, the amplifying circuit part amplifies the amplitude of the voltage using an operational amplifying circuit, the amplifying circuit may determine the amplification factor, and the initial amplitude and frequency are provided by a signal amplifier of an external device. Preferably, the isolation transformer circuit part senses the high-frequency finished product waveform generated by the operational amplifier circuit into the commercial power component of the power frequency through the isolation transformer. The utility model has the technical effects a