Hamilton Sundstrand Corporation

Pratt-whitney Canada Corp

Matthew L Wilhide

Gregory I Rozman

William S Heglund

Christopher J Courtney

Vijay K Maddali

Glenn C Lemmers, Jr

Jacek F Gieras

Frank Z Feng

Arthur A Pershall

Jr Glenn C Lemmers

An example electrical power system includes a bus current controller configured to adjust a direct current (DC) provided on a DC bus, and a plurality of energy storage modules (ESMs). Each ESM includes at least one energy storage device, and includes a DC/DC converter configured to control charging of the at least one energy storage device from the DC bus and discharging of the at least one energy storage device onto the DC bus. A shared system controller is configured to control the bus current controller and the plurality of DC/DC converters. A method of controlling an electrical power system is also disclosed.

Electrical power system including energy storage modules and shared system controller

A hybrid energy storage module system includes a first power stage having a short circuit switch to connect the first power stage to a power bus, a second power stage stacked in series with the first power stage and having a short circuit switch to connect the second power stage to the power bus, and a controller. The controller is operably connected to the first and second power stage short circuit switches to discharge one of the first and second power stage through the other of the first and second power stage in a state of charge balancing mode. Aircraft electrical systems and methods of controlling connectivity of hybrid energy storage modules to electrical systems are also described.

Hybrid energy storage module systems and methods of discharging energy storage modules

An energy storage module (ESM) assembly, ESM and method of balancing current flow on a direct current bus are provided. The ESM assembly includes a bidirectional DC-DC converter, an ESM having first and second energy cell strings connected in parallel relative to one another and configured to be connected to respective inputs of the bidirectional DC-DC converter. The ESM is configured to absorb current from the bidirectional DC-DC converter when the bidirectional DC-DC converter is operated in a buck mode. The ESM is configured to source current to the bidirectional DC-DC converter when the bidirectional DC-DC converter is operated in a boost mode.

Energy storage modules with parallel energy storage module architectures

Embodiments include systems, methods, and devices for voltage regulation of a hybrid energy storage module (HESM). The embodiments include a system controller including a first voltage regulator and a second voltage regulator, a first HESM coupled to the system controller, where the first HESM is coupled to a first bus, and a second HESM coupled to the system controller, where the second HESM is coupled to a second bus, and the first bus and the second bus are different.

Hybrid energy storage module voltage regulation

A hybrid energy storage module (HESM) configured to be used on an aircraft to provide electrical energy may include a battery and an ultracapacitor each configured to receive the electrical energy, store the electrical energy, and discharge the electrical energy, a power bus in electronic communication with the battery and the ultracapacitor, and a controller coupled to the battery and the ultracapacitor and configured to control charging and discharging of the battery and of the ultracapacitor such that a measured voltage of the power bus is adjusted based upon at least one of a battery state of charge (SOC) or an ultracapacitor SOC.

HESM fast recharge algorithm

An energy storage module (ESM) assembly includes an ESM having an energy source and a multi-level dual active bridge (ML-DAB). The ML-DAB is connected to the energy source to source current therefrom, or send current thereto, or both. A system architecture includes the ESM assembly having an ESM with an energy source, and a ML-DAB connected to the energy source to source current therefrom, or send current thereto, or both. The system architecture includes a DC bus connected to the ESM assembly.

Dual active bridge energy storage module systems

A hybrid energy storage module (HESM) configured to be used on an aircraft to provide electrical energy includes a first energy storage component and a second energy storage component each configured to receive the electrical energy, store the electrical energy, and discharge the electrical energy. The HESM also includes a controller coupled to the first energy storage component and the second energy storage component. The controller is configured to control charging and discharging of the first energy storage component and of the second energy storage component such that the first energy storage component is charged to a desired first energy storage component state of charge (SOC) before the second energy storage component is charged.

HESM high pulse power algorithm

An electrical power system for an aircraft may comprise a hybrid energy storage system, a first high voltage bus coupled to an input of said hybrid energy storage system, a second high voltage bus coupled to an output of said hybrid energy storage system, and a directed energy system coupled to the second high voltage bus. The hybrid energy storage system receives DC power via the input from said first high voltage bus, converts the DC power to a converted DC power, and dynamically stores the converted DC power and/or provides said converted DC power via said output to said directed energy system via the second high voltage bus.

Hybrid energy storage modules for directed energy systems

A hybrid energy storage module (HESM) may include a battery and an ultracapacitor each configured to receive the electrical energy, store the electrical energy, and discharge the electrical energy, a power bus in electronic communication with the battery and the ultracapacitor, and a controller coupled to the battery and the ultracapacitor and configured to control charging and discharging of the battery and of the ultracapacitor such that the ultracapacitor and the battery are simultaneously enabled in response to a power demand slew rate exceeding a power demand slew rate threshold.

HESM parallel response mode

An example electrical power system includes a DC bus including a positive rail configured to provide a positive DC voltage, a negative rail configured to provide a negative DC voltage, and a ground rail. A first ESM and a second ESM are connected to the DC bus. Each ESM includes an energy storage device. The first and second ESM are connected to and configured to provide an output voltage to a respective one of the positive and negative rail. A node connects the first and second ESMs to each other and to the ground rail. A controller is configured to determine values for the output voltages for use during at least one of a discharging mode and a charging mode bus based on a difference between a state of charge value of the first and second energy storage devices. A method of operating an electrical power system is also disclosed.

Electrical power system with multiple energy storage modules

A hybrid energy storage module includes a bus lead and two or more high-power modules connectable to the bus lead. A controller is operably connected to a first of the high-power modules and a second of the high-power module. The controller has a pulse mode, where the first high-power module is connected to the bus lead. The controller also has an extended mode, where both the first high-power module and the second high-power module are connected to the bus lead.

Hybrid energy storage module arrangements

An electrical accumulator arrangement includes a plurality of energy storage modules having source and return leads. The source lead of a first energy storage module is connected to the return lead of a second energy storage module. The return lead of the first energy storage module is electrically isolated from the source lead of the second energy storage module to pulse voltage across rails of a multi-level direct current power bus.

Electrical accumulators for multilevel power systems

A DC-DC converter including a DC input and a DC output, at least one switch connecting the DC input to a converter inductor, the converter inductor connecting the at least one switch to the DC output, a controller configured to control an open/closed state of the at least one switch, a first voltage sensor connected to the DC input and operable to provide a sensed voltage to the controller, a second voltage sensor connected to the DC output and operable to provide a sensed voltage to the controller. The controller includes a processor and a memory, the memory storing instructions for causing the controller to dynamically adjust a duty cycle limit of the DC-DC converter to be equal to one minus a numerator divided by a denominator, where the numerator is the instantaneous input voltage minus a compensation factor and where the denominator is the instantaneous output voltage.

DC-DC converter including dynamically adjusted duty cycle limit

A method of starting an aircraft engine is provided. The method includes providing motive power from a generator for starting an engine during an engine start mode and deriving electrical power by way of the generator from rotation of the engine during a generate mode, transmitting the motive power from the generator to the engine during the engine start mode by way of a constant speed drive (CSD) and regulating a frequency of the electrical power output from the generator during the generate mode by way of the CSD and coupling a generator and CSD controller (GCC) to the generator and the CSD and operating the generator and the CSD by the GCC to execute at least the engine start mode and the generate mode.

Growing community of inventors

Cherry Valley, IL, United States of America

Matthew L Wilhide