Inventor

AGIRMAN ISMAIL

US56 patents

⚠️ This page may combine multiple inventors who share the name “AGIRMAN ISMAIL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

AGIRMAN ISMAIL

OTIS ELEVATOR CO

Converter pulse width modulation strategies for three phase regenerative drives

Parallel interleaved 2-level or 3-level regenerative drives

Determining phase of AC mains in PWM controlled converters without voltage sensors

Method and apparatus for encoderless operation of a permanent magnet synchronous motor in an elevator

Elevator car speed control in a battery powered elevator system

Control strategies for multilevel line regenerative drive

Hybrid direct current link system for a regenerative drive

Bus capacitor bank configuration for a multi-level regenerative drive

Adjustment of drop rate of elevator car with electromagnetic brake system

Elevator system having battery and energy storage device

Elevator load weighing system

Conveyance system having paralleled drives

Managing an encoder malfunction in an elevator drive system

Power control system for a battery driven elevator

Bus capacitor bank configuration for a regenerative drive

Operating a three phase device using single phase power

Power management in an elevator system

Single phase operation of three phase regenerative drives

Automatic rescue and charging system for elevator drive

Active damping of a hovering elevator car based on vertical oscillation of the hovering elevator car

Elevator braking in a battery powered elevator system

Elevator speed control

Elevator drive control to protect drive components from moisture

CARRIER CORP

Intelligent charging connector for transport refrigeration system

Active converter for air conditioning systems

Motor braking for air conditioning system

Hybrid cooling for power electronics unit

Variable frequency drive thermal management

Refrigerant cooled heat sink for power electronic modules

Dual mode converter for air conditioning system

Boost converter state control

Variable frequency drive (VFD) surge detection and response

Motor identification test

Hybrid power system for transport refrigeration systems

Single stage, two level pulse width modulation strategies for active harmonic filters

Power module and converter with asymmetrical semiconductor rating arrangement

Paralleled passive front-end rectifiers with and without interleaving

Mechanically expanded microfin tube liquid cooled heat sink

Combined liquid and air cooled power electronics assembly

Heat exchanger for power electronics

Time sharing control of transport refrigeration system

Voltage conversion system for transport refrigeration system

Pulse width modulation interleaving

Enhanced channel configuration for heat exchanger to cool power electronics

AGIRMAN ISMAIL

Elevator regenerative drive with automatic rescue operation

Elevator motor drive tolerant of an irregular power source

System and method for operating a motor during normal and power failure conditions

BLASKO VLADIMIR

Operation of a three-phase regenerative drive from mixed DC and single phase AC power sources

ROGERS KYLE W

Battery mounting in elevator hoistway

KANG KEUNMO

Position feedback for elevator system