How Many Solar Panels Does Your Home Need
Step-by-step calculation of how many solar panels a home needs. Formula: consumption, solar irradiance by Ukra...
Articles
Useful articles, reviews and technical solutions
Replacing an Old Motor: How to Find a Match
Replacing an old electric motor: step-by-step guide to finding an equivalent. What to measure on a burned moto...
Choosing a Motor by Speed: 750–3000 RPM Guide
Choosing an electric motor by rotation speed: 2-pole (3000), 4-pole (1500), 6-pole (1000), 8-pole (750 rpm). T...
Running a Motor with a VFD: Practical Considerations
Running an electric motor with a VFD: overheating at low speed, bearing currents, dU/dt voltage spikes. Soluti...
Single-Phase vs Three-Phase Motor — When to Pick Which
Single-phase (220 V) vs three-phase (380 V) electric motors compared: efficiency, power, starting torque, reli...
Electric Motor Protection: Devices and Schemes
Electric motor protection against overload, short circuit, phase loss, overheating: circuit breakers, thermal...
How to Choose an Electric Motor for a Fan
How to choose an electric motor for a fan: load type, speed for axial and centrifugal fans, power table, VFD s...
How to Choose an Electric Motor for a Compressor
How to choose an electric motor for a compressor: 15–25% power margin, 1500 rpm for reciprocating compressors,...
