LSC Single Phase Solid State AC Voltage Regulator

LSC Single Phase Solid State AC Voltage Regulator

The half-wave control module is primarily used for applications controlling the intensity of coil vibrations. This module can be utilized in devices for mixing various raw materials, such as cement, tea, monosodium glutamate, feed, and other mixed materials. By using the control module, the intensity of the vibrations of the electromagnetic vibrator can be controlled. The stronger the input signal to the module, the higher the output voltage, and thus the greater the amplitude of the vibrations of the coil (vibrator).

LSA Series - Integrated Single Phase Voltage Control Module contains a phase control integrated circuit, a unidirectional thyristor, an RC circuit for impulse absorption, and a power supply circuit all integrated within. It automatically or manually regulates voltage on the load, thereby adjusting the output power.

Control and Operational Specifications

• Input Voltage Control: 0–5 V, 0–10 V
• Input Current Control: 4–20 mA, 0–10 mA
• Control via PWM: Frequency 1 kHz–3 kHz, peak voltage 4–24 V DC
• Manual Control via Potentiometer: 10 kΩ
• LED Indicators: POW, OUT, indicator lights
• Rated Operating Voltage: 220/380 V AC (low voltage available on request)
• Network Frequency: 50 Hz
• Permissible Current Surge (during one network period): 800 %
• Minimum Load Current: 100 mA
• Leakage Current: < 12 mA
• Voltage Rise Rate dV/dt: > 200 V/μs (enhanced version)
• Voltage Change Rate during Switching dV/dt: > 200 V/ms (enhanced version)
• Control Response: < 10 ms
• Maximum Turn-off Delay: < 10 ms
• Insulation Voltage (between input, output, and outer casing): > 2000 V AC
• Insulation Resistance (between input, output, and outer casing): > 1000 MΩ (500 V DC)

Operating Conditions

• Ambient Operating Temperature: -40 °C to +60 °C
• Cooling: Heat sink, forced air cooling

Selecting the Correct Current Specification

Actual Load Current * Safety Factor = Product Specification
Safety Factor: For inductive loads, it is fivefold.

• Example 1: Two-phase 380V, 2KW vibrating coil – current approximately 5 A.
  After multiplying by a safety factor of 5, we select a product with a current of 35 A.
• Example 2: Single phase 220V, 2KW DC heating element – current approximately 9 A.
  After multiplying by a safety factor of 3, we select a product with a current of 35 A.

Using a Suitable Heat Sink and Air Cooling if Necessary

The cooling conditions of the module directly affect its lifespan and ability to withstand short-term overloads. Lower temperatures increase the module's ability to deliver current. Therefore, it is essential to use a heat sink and, if necessary, to add a fan for air cooling. If water cooling is available, it should be prioritized.

Based on our calculations, we have determined appropriate types of heat sinks for different models. We recommend using heat sinks and ball bearings from our manufacturers. If the user acquires their own, they should follow these guidelines:

1. Heat Sink Surface must be flat, smooth, free of raised areas, depressions, or burrs. The heat sink surface should first be cleaned with sandpaper and wiped with alcohol, ensuring a good contact and reducing thermal resistance.
2. Applying Thermal Paste: When installing the heat sink, thermal paste must be applied or a thermally conductive pad used.
3. In High Ambient Temperatures, it is necessary to enlarge the heat sink to ensure good operating conditions.
4. Ensure Free Space around the heat sink, allowing air to flow freely and effectively dissipate heat.

Important Installation and Usage Guidelines

1. Module Protection: It is recommended to install a fast fuse disconnector on the input side of the module, which will protect the module in case of a short circuit or overload. Typically, the fuse is selected with a value 1.5–2 times the actual load current.
2. Proper Fastening: All module screws must be securely tightened and terminal blocks safely connected to minimize secondary heat. Thermal paste or a thermally conductive pad should be applied to the bottom of the module and heat sink for optimal heat dissipation.
3. Check After Heating: After the first heating of the module, it is advisable to retighten the fastening screws.
4. Grounding: If necessary, connect a grounding wire to the heat sink.