**1. Drawing Machine Double Frequency Conversion Control System** The double frequency conversion control system is currently the most widely used in drawing machines. One inverter is typically used for the main pulling function, while the other controls the winding process. For smaller or finer drawing machines, a single frequency control system may be sufficient. **1.1 System Configuration** The main pull motor is rated at 37kW, and the take-up motor is 11kW. This setup ensures efficient and precise control over both the pulling and winding processes. **1.2 Process Requirements** (1) The maximum take-up speed required is 1200m/min. To calculate the maximum operating frequency of the take-up inverter, we consider the diameter of the main drive pulley (280mm), the initial reel diameter (280mm), and the final reel diameter (560mm). At the beginning of the winding process, the reel has its smallest diameter, requiring the highest speed. At this point, the rotational speed is approximately 1363r/min, which corresponds to a frequency of 45.4Hz. To ensure that the maximum take-up speed meets the requirement of 1200m/min, the inverter's maximum frequency can be set to 50Hz. The main pull inverter's maximum frequency is calculated as 75Hz based on the transmission ratio, with an upper limit of 45.4Hz to maintain consistent speed. During commissioning, it is usually set to 50Hz for stability. (2) The processing range includes various wire diameters: from 2.8mm to 1.2mm, 2.5mm to 1.0mm, and 2.0mm to 0.8mm. This flexibility requires precise control over both the pulling and winding speeds. (3) The tension pendulum must remain stable throughout the entire operation to prevent any fluctuations in the line tension. **1.3 Control Theory**  The main pull inverter primarily provides a reference speed for the wire drawing process. Meanwhile, the take-up inverter performs PID fine-tuning based on feedback from the tension pendulum, ensuring a constant take-up speed and, consequently, stable tension. This system effectively maintains synchronization between the front and rear stages. **1.4 Commissioning Instructions and Advantages of Non-Induction Vector Control** During commissioning, the open-loop vector mode of both the main pull and take-up inverters is first tested. The maximum frequency of the take-up inverter is determined based on the required maximum linear speed, and then adjusted according to the actual transmission ratio to minimize speed differences between the two stages. Using the feedback from the pendulum potentiometer, the PID control of the take-up inverter is fine-tuned to achieve better synchronization between the stages. Additionally, the acceleration and deceleration time of the main pull inverter should be as long as possible (typically 40–60 seconds) to ensure smooth start-up and operation. The use of non-induction vector inverters ensures smooth operation regardless of load conditions—whether the machine is empty, fully loaded, or running at low, medium, or high speeds. These inverters automatically detect the wire drawing speed and diameter, replacing traditional PLC and PID control systems. This results in a more stable, efficient, and reliable operation of the drawing machine.

Folding Electric Mobility Scooters

Welcome to our product category dedicated to folding electric mobility scooters, the ultimate solution for individuals seeking convenience, portability, and freedom. At our company, we specialize in designing and manufacturing innovative medical devices, and our folding electric mobility scooters are specifically crafted to provide a compact and reliable means of transportation for individuals with limited mobility. With their advanced features and collapsible designs, our scooters offer unparalleled flexibility and ease of use.

Electric mobility scooters are designed with convenience in mind. Their unique folding mechanisms allow for effortless storage and transportation. With just a few simple steps, you can easily fold or unfold your scooter, making it ideal for travel, commuting, or simply saving space at home. Say goodbye to the hassle of bulky and cumbersome mobility devices.

Portability is a key feature of our 4 Wheel Electric Scooters. When folded, they become compact and lightweight, making them easy to transport in a car trunk, on public transportation, or even as carry-on luggage for air travel. Whether you're exploring a new city or visiting friends and family, our scooters provide the freedom to go wherever you desire.

Comfort is paramount in our folding electric mobility scooters. We understand the importance of a comfortable ride, especially for those who may spend extended periods on their scooters. Our scooters feature adjustable seats, padded armrests, and ergonomic handlebars to ensure optimal support and relaxation during your journeys. Enjoy a smooth and comfortable ride, even on uneven terrains.

Safety is a top priority in our folding electric mobility scooters. Each scooter is equipped with reliable braking systems, intuitive controls, and comprehensive lighting, ensuring your safety during both daytime and nighttime use. We understand the importance of stability, and our scooters are designed to provide a secure and balanced ride, minimizing the risk of accidents or falls.

Versatility is a hallmark of our folding electric mobility scooters. With their compact designs and easy folding mechanisms, they are suitable for a wide range of environments and activities. From running errands in the city to exploring outdoor trails, our scooters adapt to your lifestyle and enable you to fully participate in various activities with ease.

Our company is a renowned manufacturer specializing in innovative medical devices, committed to empowering individuals with limited mobility. With a passion for improving lives, we have established ourselves as a trusted provider of high-quality folding electric mobility scooters.

Our team of dedicated professionals consists of skilled engineers, designers, and customer service representatives who work collaboratively to create exceptional products. We are driven by a deep understanding of the unique needs and challenges faced by individuals with limited mobility, and we strive to deliver solutions that enhance their independence, freedom, and overall well-being.

Quality is at the core of our manufacturing process. We utilize premium materials and state-of-the-art technologies to ensure the durability, performance, and safety of our folding electric mobility scooters. Each scooter undergoes rigorous testing and quality control procedures to meet the highest industry standards.

Customer satisfaction is our top priority. We are committed to providing exceptional customer service, assisting you throughout your mobility journey. Our knowledgeable and friendly staff is available to answer your inquiries, offer guidance, and provide any necessary support.

As a socially responsible company, we are dedicated to environmental sustainability. We actively pursue eco-friendly manufacturing practices, minimizing waste and reducing our carbon footprint. By choosing our folding electric mobility scooters, you not only improve your own mobility but also contribute to a greener and cleaner future.

In conclusion, our folding electric mobility scooters offer the perfect combination of convenience, portability, comfort, and safety. We are devoted to providing individuals with limited mobility the opportunity to regain their independence and embrace life to the fullest. Experience the freedom and flexibility that our folding electric mobility scooters bring to your everyday mobility needs.

Collapsible e-scooters, portable travel rides, foldable commuter wheels, space-saving scooters

Ningbo Baichen Medical Devices CO.,ltd , https://www.bcscooter.com