Application Cases

EMC is an acronym for Electromagnetic Compatibility (or Conformance). All electronic devices have the potential to emit electromagnetic fields and are susceptible to being affected by them. With the continuous increase of electronic devices in daily life, there is significant potential for mutual interference between devices. No electrical product or installation design can be considered complete unless all EMC aspects are taken into account.

What does EMC specifically test? Electromagnetic compatibility testing primarily focuses on two aspects: EMI (Electromagnetic Interference) and EMS (Electromagnetic Susceptibility).

EMI (Electromagnetic Interference) includes subtests such as:

• CE (Conducted Emission)

• RE (Radiated Emission)

• PT (Power Test, disturbance power)

EMS (Electromagnetic Susceptibility) includes subtests such as:

• ESD (Electrostatic Discharge)

• RS (Radiated Susceptibility)

• EFT/B (Electrical Fast Transient/Burst)

• Surge (Lightning Surge)

• CS (Conducted Susceptibility)

  
  

Case 1: Application of ATA-314 in CS101 Power Line Conducted Susceptibility Testing

Figure 1: CS101 Power Line Conducted Susceptibility Test Setup Diagram

In the experiment, the test equipment was connected according to the CS101 standard. A 0.5-ohm resistor was connected across the secondary winding of the coupling transformer for calibration. A susceptibility signal (sine wave) was generated by a signal generator and the ATA-314 power amplifier. This signal was applied to the 0.5-ohm resistor via the coupling transformer. An oscilloscope was used to read the voltage level of the input signal. When this power value was less than the limit specified by the standard, the output amplitude of the signal source was increased until the value monitored by the oscilloscope reached the standard limit value.

Case 2: Application of Power Amplifiers in Helmholtz Coil Design for EMC Experiments

Figure 2: EMC Experimental System Block Diagram

The EMC experimental system consists of: a Helmholtz coil, an ammeter, a power amplifier, and a signal generator. The signal generator (arbitrary waveform/function generator) produces a sine wave at a specific frequency. This signal is amplified by the power amplifier and then output to the Helmholtz coil. By monitoring and adjusting the current flowing through the coil, the magnetic flux density generated by the coil is controlled.

Electromagnetic Compatibility (EMC) testing, as one of the quality measurement indicators for electronic and electrical products, is crucial. The accuracy of its testing directly relates to the reliability and safety of the product itself during use. Furthermore, it can potentially affect other parts within the same system. Poor electromagnetic compatibility can directly lead to system malfunction and may even cause serious harm to the user's health (nerves, senses, etc.). Therefore, EMC testing has become an indispensable part of quality inspection for electronic products.

Power amplifiers play a vital role in EMC testing, especially the ATA-3000 series power amplifiers. With a maximum output power of 1000 Wp, they can drive power-type loads. The voltage gain is digitally controllable and adjustable, and frequently used settings can be saved with one button, providing convenient and straightforward operation. They can be used with mainstream signal generators to achieve signal amplification.

ATA-3000 Series Power Amplifier Application Scenarios: Helmholtz Coil Driving, Loudspeaker Testing, Ultrasonic Horn Testing, Current Sensor Testing, Electromagnetic Testing, Battery Thermal Management.

Figure 3: ATA-300/3000 Series Power Amplifier Specifications and Parameters