Otis Elevator Company

Carrier Corporation

HanJong Kim

Ismail Agirman

Xu She

David Ginsberg

Yang Wang

Shashank Krishnamurthy

Edward D Piedra

Christopher S Czerwinski

Jeffrey M Izard

XuQiang Liao

Jaegue Shin

Daryl J Marvin

Vladimir Blasko

Jeffrey John Burchill

Mary D Saroka

Christopher G Repice

Kyle W Rogers

Prasanna Nagarajan

Steven M Millett

Frank Higgins

David J Lanesey

Bassel Al-Annouf

Draguna Vrabie

Rui Huang

A low-voltage system of a transport refrigeration unit (TRU) includes a low-voltage direct current (LVDC) source; and a distribution bus coupled to the LVDC, the distribution bus is coupled to a compressor, at least one condenser, and at least one evaporator.

Low voltage power system for a transport refrigeration unit

A high-voltage system for a transport refrigeration unit (TRU) includes a high-voltage direct current (HVDC) source, and a first converter coupling the HVDC source to a distribution bus, the distribution bus is coupled to a compressor, at least one condenser, and at least one evaporator. A distribution bus is coupled to a compressor bus coupled to the compressor, a condenser bus coupled to the at least one condenser, and an evaporator bus coupled to the at least one evaporator.

Medium-to-high voltage power system for a transport refrigeration unit

An exemplary heating ventilation and cooling (HVAC) system includes a multi-phase power input, an AC-DC rectifier connected to a DC-AC inverter via a DC power bus, a multi-phase power output connecting the DC-AC inverter to a fan blower motor, and at least one redundancy power system. The redundancy power system is configured to bypass at least one of the AC-DC rectifier and the DC-AC inverter.

Redundant power supply for HVAC system including refrigerant leakage mitigation

An air conditioning system including a compressor having a motor; a condenser; an evaporator; a drive providing multiphase, AC output to the motor; a motor braking assembly electrically connected to the drive, the motor braking assembly including at least one switch and at least one braking resistor; wherein the at least one switch is held in an open state by power from the drive; wherein upon disruption of power to the motor, the at least one switch assumes a closed state shorting windings of the motor through the at least one braking resistor.

Motor braking for air conditioning system

A transportation refrigeration system including: a transportation refrigeration unit comprising a motor; a power conversion unit configured convert an amplitude, a frequency and a phase of an input electrical power signal, wherein the power conversion unit comprises a first power bridge, a DC link and a second power bridge; an energy storage device configured to supply electrical power to the motor via the power conversion unit during a road mode; a first switch configured to selectively connect the first power bridge to the energy storage device or the motor; and a second switch configured to selectively connect the second power bridge to the motor or a power grid; wherein the first switch and second switch are positioned to connect the first power bridge and second power bridge to specified sources and outputs during each of the road mode and the standby mode.

Time sharing control of transport refrigeration system

A voltage conversion system includes an energy storage device; a power conversion unit connected to the energy storage device, the power conversion unit comprising: an inductor, the inductor comprising a number of coils that are non-coupled or weakly coupled, with a coupling coefficient less than 0.05; a multi-phase boost stage coupled to the inductor, wherein the multiphase boost stage comprises a number of phases that equals the number of coils; an inverter coupled to the multiphase boost stage; and a load coupled to the power conversion unit.

Voltage conversion system for transport refrigeration system

A conveyance system includes a machine having a motor; a source of AC power; a drive system coupled to the source of AC power, the drive system to provide multi-phase drive signals to the motor, the drive system including: a first drive having a first converter and a first inverter, the first convertor including a first positive DC bus and a first negative DC bus; a second drive having a second converter and a second inverter, the second convertor including a second positive DC bus and a second negative DC bus; wherein the first positive DC bus and the second DC positive bus are electrically connected and the first negative DC bus and the second negative DC bus are electrically connected.

Conveyance system having paralleled drives

A method () for controlling a multilevel regenerative drive () having a converter () and an inverter () is disclosed. The method () may include applying at least one of unipolar modulation and bipolar modulation to the converter (), and applying at least one of unipolar modulation and bipolar modulation to the inverter (). A control system () for a mechanical system () having a motor () is also disclosed. The control system () may comprise a converter () operatively connected to a power source (), and an inverter () operatively connected to the motor () of the mechanical system (). At least one controller may be in communication with the converter () and inverter (), and may be configured to apply at least one of unipolar modulation and bipolar modulation to each of the converter () and the inverter ().

PWM strategy for regenerative multilevel drive

A system including a drive portion, and an external computing device in communication with the drive portion, wherein the external computing device is configured to receive operational data from the drive portion, determine operational parameters based at least in part on the operational data, determine whether the operational parameters are valid, and automatically transmit commands to the drive portion if the operational parameters are valid.

System and method of maintaining performance of a system

A power system including a first drive including a first drive output, a second drive including a second drive output, wherein the first drive output is larger than the first drive output, at least one inductor operably coupled to the first drive and the second drive, and a load operably coupled to the system output.

Interposition inductor arrangement for multiple drives in parallel

An elevator control system includes an elevator group system including one or more elevators and an elevator group controller configured to control operation of the one or more elevators. The system includes at least one of an external elevator management system and an external power provider connected via a data communications link to the elevator group controller. The elevator group controller is configured to transmit to the at least one of the external elevator management system and the external power provider elevator operation information, and the at least one of the external elevator management system and the external power provider is configured to transmit to the elevator group controller elevator operation control information based on the elevator operation information. The elevator group controller is configured to then control operation of the one or more elevators based on the elevator operation control information.

Elevator control system having controller in communication with power provider

A regenerative elevator drive device, a method for buffering energy of a regenerative elevator drive device, and an elevator system are disclosed. The regenerative elevator drive device may include an inverter having a plurality of power components and a converter having a plurality of power components. The regenerative drive may further include a direct current (DC) link bridging the inverter and the converter, the DC link including a first capacitor bridging the inverter and the converter and a second capacitor in parallel with the first capacitor. The regenerative elevator drive device may be a multi-level regenerative drive device.

Bus capacitor bank configuration for a regenerative drive

A battery powered elevator system in which the battery and power electronics needed to connect the battery to the machine driving the elevator system are mounted in close proximity within the hoistway of the elevator system to minimize power transmission losses.

Battery mounting in elevator hoistway

A hoist motor () for an elevator () is continuously driven from an irregular power supply (). A regenerative drive () delivers power between the power supply () and the hoist motor (). A controller () measures a power supply voltage in response to a detected change in the power supply voltage and controls the regenerative drive () to adjust a nominal motion profile of the elevator () in proportion with an adjustment ratio of the measured power supply voltage to a normal power supply voltage.

Growing community of inventors

Avon, CT, United States of America

HanJong Kim