These separate digital and analog control circuits, with a power stage, provide a complete motor-control platform for air-conditioning applications. The platform enables variable-speed sinusoidal-current control and eliminates the need for position sensors. The IRMCF311 or IRMCF312 provides the digital control. A patented Motion Control Engine (MCE) in the unit implements the complex, sensorless permanent-magnet, synchronous-motor algorithm in hardware. In addition, an Analog Signal Engine (ASE) contains all signal-conditioning and conversion circuits, and an application-layer processor defines the operation of the air-conditioning system to control both the ac fan and the compressor motors. Design tools allow controller-performance evaluation and algorithm customization with minimal effort. The IRS2136D 600V, three-phase analog-driver IC includes built-in bootstrap diodes and other features to simplify driving and protect the power stage's insulated-gate bipolar transistors (IGBTs). Packages for the IRMCF3xx are 64- or 100-pin QFPs and for the IRS2136D 28-pin SOICs or a 44-pin PLCCs.
At this year's MD&M West show, lots of material suppliers are talking about new formulations for wearables and things that stick to the skin, whether it's adhesives, wound dressings, skin patches and other drug delivery devices, or medical electronics.
The US Congress has extended an important tax credit for solar energy, a move that’s good news for future investments in this type of alternative energy and for many stakeholders in the solar industry.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.