Device and method for controlling alternating current PTC heater, alternating current equipment and vehicle,

Abstract

The invention discloses a device and method for controlling an alternating current PTC heater, alternating current equipment and a vehicle. The device for controlling the alternating current PTC heater comprises: a zero crossing detection module used for detecting a zero crossing point signal of an alternating current electric signal for supplying power to an alternating current PTC heater; a driving module comprising a controllable switch used for controlling the alternating current PTC heater; and a control module connected with the zero crossing detection module and the driving module, and used for obtaining the required heating power, obtaining a target phase shift angle for driving the controllable switch according to the required heating power, responding to the zero crossing point signal, and controlling the conduction time of the controllable switch according to the target phase shift angle, so that the AC PTC heater outputs the required heating power. According to the device for controlling the alternating-current PTC heater, the alternating current PTC heater is arranged, heat energy supply of low-temperature heating of a heat pump system is met, the heating requirement is met, the technology is mature, cost is low, and the application range is wide.

Description

technical field [0001] The present invention relates to the technical field of vehicles, in particular to a device and method for controlling an AC PTC (Positive Temperature Coefficient, positive temperature coefficient) heater, AC equipment and a vehicle. Background technique [0002] The main power of electric vehicles comes from battery packs, and the power supply is mostly DC, and most of the electric loads in the vehicles are DC loads. Among them, high-voltage DC loads generally include motor controllers, DC / DC (direct current / direct current, direct current to direct current) converters, air conditioner PTC (Positive Temperature Coefficient, positive temperature coefficient) heaters, and vehicle power assemblies. PTC heaters for air conditioners in high-voltage DC loads can use AC and DC power supplies. However, the working power of DC PTC heaters is affected by the total voltage of the battery pack. It is difficult to platformize and standardize PTC for different batte...

AI Technical Summary

Problems solved by technology

PTC heaters for air conditioners in high-voltage DC loads can use AC and DC power supplies. However, the working power of DC PTC heaters is affected by the total voltage of the battery pack. It is difficult to platformize and standardize PTC for different battery voltage platforms. At the same time, the production process of PTC cores is not enough. Mature, and the AC PTC power supply voltage is 220V mains, the power supply voltage is unified, and it is easy to realize the platformization and standardization of the PTC core. The AC PTC is widely used in household air conditioners, and the technology is relatively mature compared to the DC PTC core manufacturing process

In the thermal management system of the air conditioner, due to the high heat conversion efficiency of the heat pump and the low power consumption, the heat pump solution has increasingly become the mainstream management solution for the thermal management of the air conditioner. Auxiliary heating by the heater is expensive and has a small scope of application. If the DC PTC heater is cancelled, the normal heating capacity of the heat pump is likely to be insufficient to meet the temperature requirements of the passenger compartment.

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