Motor drive and current detection circuit of vacuum sealer

The utility model provides a motor drive and current detection circuit of a vacuum sealer. The motor drive and current detection circuit comprises a motor MOT2, a diode D3, an MOS tube Q3, a resistorR18, a resistor R23, a resistor R24, a resistor R26, a resistor R34, a capacitor C13, a capacitor C20, a capacitor C21, a port MOT and a port SW. The circuit is ingenious in design, the access port isused for detecting the current value so as to replace a mechanical pressure switch to detect the pressure value, and when the detected current value reaches the set value, the heating sealing actionis started. The environment adaptability of the vacuum sealing machine is improved, and the problem that a mechanical pressure switch breaks down is avoided. 本实用新型提供了一种真空封口机的马达驱动和电流检测电路，包括马达MOT2、二极管D3、MOS管Q3、电阻R18、电阻R23、电阻R24、电阻R26、电阻R34、电容C13、电容C20、电容C21、端口MOT和端口SW。本实用新型的电路设计巧妙，通过接入端口检测电流值从而代替机械式压力开关检测压力值，当检测的电流值达到设定值时，启动加热封口动作。本实用新型不仅提升了真空封口机的环境适应能力，且避免了机械式压力开关出故障的问题发生。