Achieve higher performance and stronger isolation

In most car manufacturers, we can see the use of automatic robot technology for weight lifting and component assembly.

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In this case, accuracy is a critical factor because motors, robotic arms, switches, and high-voltage equipment must be as consistent as symphonies. However, keeping the system's zero errors in an electrical noisy environment is not that simple. Currently, Texas Instruments has found a new approach to industrial noise that ensures motor control accuracy through isolation, modification and filtration.

With enhanced isolation technology, TI can help designers create high-precision systems, as the new TI Design reference design – enhanced isolation three-phase inverter with current, voltage and temperature protection (TIDA-00366) .

“The new TI Design is an ideal reference for the immediate start-up of enhanced isolation inverters. It is rated for power up to 10kw and offers a wide range of protection features,” said Matthias Taenze, an engineer responsible for adjusting the reference design. “Our focus is on the compactness and efficiency of the device.”

The three-phase inverter reference design combines TI's recent enhancement isolation devices, including the industry's highest performance enhanced isolation amplifier, the AMC1301, and the recently introduced enhanced isolation gate driver UCC21520.

Whether it's consumer electronics or solar inverters, isolation is a must for many products. Nagarajan Sridhar, TI's product marketing manager, said that devices such as the AMC1301 and UCC21520 converge on TI's expertise in power management and high-precision signal chains, as well as TI's extensive experience in enhanced isolation research and development.

“These products have established TI's leading position in the entire market,” he added.

Deep knowledge base

TI's global analog team has been working to provide designers with industry-leading isolation chips because their applications often require additional protection grids (also known as dual isolation) through enhanced isolation techniques.

The three most common applications for new amplifiers include industrial motor drives, solar inverters, and uninterruptible power supplies (UPS).

In order to cope with high voltage peaks and high energy peaks, designers must meet stringent industry isolation standards, and TI's enhanced isolation devices have exceeded industry standards. In addition, TI's devices provide a low-power architecture that improves overall power efficiency of the power device, simplifies power supply design, and reduces thermal drift.

“For example, some customers must meet system standards for motor drives, but standards for isolated components tend to be higher,” said TI employee Navin Kommarjau. “A few years ago, TI’s process and design teams developed a foundation. Capacitance isolation is more reliable than optical isolation. In addition, TI's manufacturing and process teams have taken this technology a step further by providing additional room for existing isolation standards."

The key to improving system performance

In addition to higher reliability, TI's isolation technology provides longer product life.

"With over 1000V operating voltage, the high-performance amplifier can run for at least forty years and is very stable and durable," said marketing manager Robert Schreiber. “Quality and reliability are critical to this device, and TI's reliability is the best in the industry.”

Designers are looking forward to TI's new enhanced isolation amplifiers. TI has provided more than 1,700 samples to more than 60 customers.

"The combination of semiconductor process, packaging, signal chain and high voltage technology under strict quality control has made TI's product stand out. Before we officially released this product, many customers have already experienced it during the trial process," Navin said.

Designers are currently applying this amplifier to high-precision elevator motor control systems, another area where reliability is critical because manufacturers want their devices to operate without problems for years.

“In high-rise buildings, TI's devices enable fast start and stop of fast elevators. To meet this demand, they need to measure temperature and voltage very accurately,” Robert said. “There is a behind-the-scenes motor drive that supports this. TI The product can be used to measure current in a motor drive system, and this system requires very precise control."

The reference design also features the new UCC21520, the industry's fastest 5.7kVRMS isolated dual-channel gate driver for high-voltage applications where system protection and reliability are critical.

"The UCC21520 offers universal compatibility, which allows designers to integrate isolation and power management functions into several applications while helping to protect systems and personnel from potentially harmful high voltage surges," Nagarajan said. .

The power management chip provides enhanced isolation of 5.7kVRMS, surges up to 12.8kV immunity test and common mode transient rejection above 100V/ns. By providing a fast propagation delay of 19ns, this device achieves high power density and efficiency. These advantages result in smaller solution sizes and reliable operation.

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