DMC Patents

Within the automotive sector, the quantity of integrated circuits (ICs) is on the rise annually, expanding to various modules responsible for managing car lighting, heating, and sensors. The evolving automotive design approach, featuring enhanced functionality and electrical oversight, prompts inquiries into the safety of the design and the ability of onboard electronics to endure the typical transients found in automotive settings. In automotive settings, voltage levels can exceed IC specifications significantly or even turn negative. Transients pose a more pronounced threat in 24V battery systems like those in commercial trucks, forklifts, and public transport vehicles. The risk of damage to the vehicle's electrical control module due to voltage spikes can be attributed to voltage regulator malfunctions, ignition device impacts, high inductance load switch activation, incorrect cable connections, and cable disconnections. These over-voltages manifest as brief voltage spikes lasting just milliseconds, reaching up to 350V during coil ignition.

When a relay is connected to a motor, a brief surge of 5 to 10 times the current occurs, similar to the surge voltage and current generated by a long battery cable. HydroLync has created and patented a controller designed to safeguard the fan motor of truck oil coolers, prolonging its lifespan by taking into account the electrical characteristics of vehicles. The DC Motor Controller (DMC) drive method monitors the temperature of the fluid circulating within the matrix, shutting off when it falls below the preset temperature to allow for cooling.

The key features of HydroLync's DMC include:

1.Noise signal filtering circuit of thermal contact

When the temperature of the fluid reaches near the temperature sensor set point, mechanical ON / OFF occurs frequently, which is noisy and affects the controller.

Therefore, the noise signal filtering circuit is used to control the stable signal.

2. Relay operation signal by photoelectric device

Connecting the temperature sensor signal directly to the relay switch terminals is vulnerable to overcurrent and overvoltage.

Therefore, the temperature sensor signal is protected by a photoelectric element.

3. Power inlet protection

The voltage of the generator of the car rises in proportion to the increase in the speed of the generator and the current. The generator generates approximately 140V of voltage at 10,000rpm, and the overvoltage resulting from the failure of the regulator can momentarily reach up to 350V.

To protect against these special situations, a voltage bypass circuit has been added to the inlet to protect the controller and motor from over-voltages.

4. Motor part protection

The coil of the motor has inductance, which causes the inrush current. Therefore, it is designed to protect against this particularity.