Important Notice Regarding the Use of Our QNZ1-Q Series Energy-Saving Contactors with PWM Controllers

Dear Valued Customer,

With ongoing technological advancements, modern utility vehicles such as engineering machinery, electric sightseeing cars, golf carts, and patrol vehicles are increasingly adopting high-efficiency AC motors like permanent magnet synchronous motors and three-phase AC asynchronous motors. In these applications, the motor controller is typically connected to the vehicle battery via a DC contactor for power switching. While PWM (Pulse Width Modulation) modules within motor controllers contribute to energy-saving control, their potential for further efficiency improvement is limited.

In response, we are proud to introduce the QNZ1-Q Series Energy-Saving DC Contactor, designed to provide a superior solution for such applications. A key feature of this product is its zero-power-consumption coil, which significantly enhances overall energy efficiency. In fact, many industry-leading customers have already recognized the advantages of the QNZ1-Q Series — by eliminating the PWM module from the motor controller, they have simplified system design, reduced failure rates, and achieved notable cost savings.

In response, we are proud to introduce the QNZ1-Q Series Energy-Saving DC Contactor, designed to provide a superior solution for such applications. A key feature of this product is its zero-power-consumption coil, which significantly enhances overall energy efficiency. In fact, many industry-leading customers have already recognized the advantages of the QNZ1-Q Series — by eliminating the PWM module from the motor controller, they have simplified system design, reduced failure rates, and achieved notable cost savings.

For those who continue to use PWM pulse signals to control the DC contactor coil, please ensure the PWM output voltage is set to 100%. This adjustment is critical to guaranteeing contactor reliability, as any deviation may compromise performance and system stability.

We look forward to further discussions to help you fully understand and maximize the benefits of our products.

Thank you for your trust and support.

Sincerely,
Nanjing Quanning Electric Co., Ltd.
February 22, 2024