Solution of DC300V-DC700V High Voltage 2KW PTC Heater used in Electric Vehicle HVAC

2020-06-08 16:05:06

DC300V-DC400V High Voltage 2KW PTC Heater used in Electric Vehicle HVAC Video

High Voltage DC300~700 PTC heater Mainly used in All-electric Vehicle HVAC System

Why the high voltage PTC heater mainly used in All-electric Vehicle HVAC system? and how to make the High Voltage PTC used in electric bus HVAC or DC300V-DC400V PTC heater used in all-electric truck refrigerated units system? Generally it is not like 220V high voltage PTC used in home air conditioner system, because the home used PTC heater, they generally use 15mm thickness PTC, and vehicle high voltage PTC heater must use big power PTC with its thickness is around 30mm, Vehicle high voltage PTC must be meet the Vehicle HVAC requirements. VehicleAC's engineer will let you now, click and learn it today

Generally the control switch of electric bus HVAC or all-electric truck refrigerated units system often used CAN controller or relay controller system, so if you need buy high voltage PTC heater, the first step is tell us how is your company control the electric transport refrigeration unit, your control switch is belong CAN controller or relay controller?

Hight Voltage DC300~700 PTC heater with CAN controller system:

Currently, in China’s all-electric vehicle HVAC system, generally adopts CAN Controller system, such as BYD and Yutong's electric vehicle HVAC that we cooperation they basically uses CAN Controller, Therefore, in order to adapt to and meet the market needs, we have developed the most advanced CAN control PTC, it is really advanced, BYD and Yutong are currently using it, and it's running very well. In fact, our technician said adopted CAN control PTC heater due to the vehicle manufacturer took a lot of hard work to find the best solution, you know that PTC heaters can cause burns and fires

So if your electric vehicle HVAC system using CAN controlling system, and you need high voltage PTC heater with CAN controller system, would you like to provide us your CAN protocol of controller?

PTC CAN controller and Vehicle HVAC CAN controller are responsible for different functions

About the how to control the PTC with CAN controller, It uses the CAN signal in the low-voltage controller to give the high-voltage signal to control the high-voltage PTC

The CAN control system of PTC needs to be connected to and controlled by the CAN controller system of the transport refrigeration unit.

The PTC CAN controller is used to control whether the PTC heater is high-voltage, low-voltage, high-temperature, low-temperature safety functions, and realize the frequency conversion to adjust the operating power of the heater, and will collect data when the PTC heater is working; that mean you need PTC CAN controller contact with transport refrigeration units CAN controller system, and can adjust 0-5KW. this means that if you want to achieve frequency conversion to adjust the power of the PTC heater (for example, 0-10KW), you need to connect the PTC CAN controller with the CAN controller system of the transport refrigeration unit to achieve the frequency conversion adjustment of the heater power. By the way, the power of the PT heater can be controlled by CAN to give a signal to frequency conversion. If a relay controller is used, the adjustment method may be different.

The CAN controller system of your vehicle HVAC, such as the transportation refrigeration unit is only used to control the PTC working or not working, just give a signal to indicate that the CAN control system of the PTC heater is working or not working.

If your transport refrigeration unit does not use a CAN control panel, the above explanation will make you feel very confused. please watch the following part if you use relay controller system.

Technical Requirements of High Voltage DC312V~DC400V PTC Heater with CAN Controller:
1.Rated voltage DC312V~DC400V,power 0~4KW adjustable;
2. Insulation resistance DC1000V/min, no less than 50MΩ;
3. Insulation withstand voltage AC2500V/min, no flashover, no breakdown, no ignition;
4. The high-voltage wiring harness adopts orange 2.5 square wiring harness;
5. Waterproof grade IP67;
6. Unmarked dimensional tolerances perform GB/T 1804-m,
Unmarked geometric tolerances perform GB/T 1184-k;
7.L can be customized

High Voltage DC300~700 PTC heater with relay controller system:

If your company’s vehicle HVAC system use relay controller, there are two kind of solution to use high voltage PTC

Solution 1: PTC heater with a hard controlling system
If you use relay controller, you also can adopts PTC heater with its controlling system, this control method is belong to hard controller. The PTC heater is divided into several gears according to its power. Such as 6 KW high voltage PTC heater, you can divide the 6KW heater into three gears, the first gear is 2KW, the second gear is 4KW, and the highest grade is 6KW. There are three gears in total.

So if you want adopt this solution, please tell us how many gears are you going to use to control the power of the PTC heater? And what function is requires?

Solution 2: PTC heater no controlling system just 2 High Voltage + - wire
If you use relay controller, just remove the controller box, and with 2 High Voltage + - wire, you can use it, and If it is in this case, you can't use frequency conversion adjustment, you can only run PTC at full power, If the high voltage PTC is controlled by a relay at full power, the service life may not be as long as the CAN controller to control the high voltage PTC, this is why in China market, Big Brand Vehicle manufacturer use CAN controller to control Vehicle HVAC system

What is the normal operating temperature of PTC heater in this situation? that is depending on what is the wind speed? The temperature of PTC is different under different conditions, usually the drying working temperature of PTC is 220℃without wind. So If you need add a bimetal thermostat to protection against high thermal temp., We suggest generally adding a temperature switch of 90℃

Technical Requirements of High Voltage DC300V~DC400V PTC Heater with + - Wire:
1. Working voltage: DC300V~DC400V;
2. Rated Power: 2KW;
3. Unmarked dimensional tolerances perform GB/T 1804-m;
4. The terminal should be installed firmly, and the wiring harness should be intact when wiring to avoid falling off and leakage;
5. PTC heating components have anti-dry performance;
6. Heat-generating components and over-temperature insurance adopt high-temperature resistance (250°C) and high-voltage resistance (750V) PTFE lead wires;
7. Under the environment required for the experiment, the electric heating core is externally applied with a voltage of 2550VAC, the applied voltage time is 60S, the leakage current is <5mA, no breakdown, flashover;
8. Under the environmental conditions required for the test, add 900VDC voltage to the electric heating core, and the insulation resistance is ≥100 MΩ;
1000VDC voltage is externally applied between the electric heating core and the over-temperature insurance, the insulation resistance is ≥ 50MΩ
8.The over-temperature insurance terminal should be firmly connected without falling off, and the terminal sheath should have good high temperature resistance, corrosion resistance and flame retardant properties.

High Voltage DC300~700 PTC heater Factory

VehicleAC mainly dedicated to solving the cooling and heating systems on commercial vehicles, especially the heating and cooling systems of electric new energy commercial vehicles that have been hot in the past two years. We strive to provide the best PTC heater solutions for all-electric truck refrigeration units and all-electric bus air conditioners, furthermore please apply to join VehicleAC hight voltage DC300V-DC700V PTC heater dealer system for greater support, Interest please contact us by eamil info@vehicleacparts.com !

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