Asim Mumtaz

US Patent:

20130346054, Dec 26, 2013

Filed:

Jun 26, 2012

Appl. No.:

13/533945

Inventors:

Asim Mumtaz - Redwood City CA, US

International Classification:

G06F 17/50
G06F 1/26

US Classification:

703 13, 713300

Abstract:

For an array of installed energy harvesting devices, a method of gathering information about individual devices in the array and generating a layout or map of the installed devices based on the gathered information is provided. A communications gateway or a base station gathers the information and determines the positions of individual micro-inverters. The gathered information is used to generate a topological or geometrical map of the installed devices.

US Patent:

20130294126, Nov 7, 2013

Filed:

Apr 4, 2013

Appl. No.:

13/856575

Inventors:

Asim Mumtaz - Redwood City CA, US

International Classification:

H02M 7/46

US Classification:

363 95

Abstract:

We describe a photovoltaic (PV) panel system comprising a PV panel with multiple sub-strings of connected solar cells in combination with a power conditioning unit (microinverter). The power conditioning unit comprises a set of input power converters, one connected to each sub-string, and a common output power conversion stage, to provide power to an ac mains power supply output. Integration of the micro-inverter into the solar PV module in this way provides many advantages, including greater efficiency and reliability. Additionally, embodiments of the invention avoid the need for bypass diodes, a component with a high failure rate in PV panels, providing lower power loss and higher reliability.

US Patent:

20170201100, Jul 13, 2017

Filed:

Mar 24, 2017

Appl. No.:

15/469346

Inventors:

- San Mateo CA, US
Asim Mumtaz - Redwood City CA, US

International Classification:

H02J 3/38
H02M 7/44

Abstract:

We describe a photovoltaic power conditioning unit for delivering power from multiple photovoltaic panels to an ac mains power supply output, comprising: a dc input for receiving power from multiple photovoltaic panels; an ac output for delivering ac power to the ac supply; a bank of electrolytic energy storage capacitors for storing energy from the dc source for delivery to the ac supply; a dc-to-ac converter coupled to the ac output and having an input coupled to the bank for converting energy stored in the bank to ac power for the ac supply; and further comprising: a plurality of sense and control circuits, one for each capacitor in the bank, wherein each circuit is coupled in series with a capacitor, and is configured to disconnect the associated capacitor from the bank upon detection of a current flow through the associated capacitor of greater than a threshold current value.

US Patent:

20170093164, Mar 30, 2017

Filed:

Dec 12, 2016

Appl. No.:

15/375586

Inventors:

- San Mateo CA, US
Asim Mumtaz - Redwood City CA, US

International Classification:

H02J 3/38
H02M 7/48
H02M 5/458

Abstract:

We describe a photovoltaic (PV) panel system comprising a PV panel with multiple sub-strings of connected solar cells in combination with a power conditioning unit (microinverter). The power conditioning unit comprises a set of input power converters, one connected to each sub-string, and a common output power conversion stage, to provide power to an ac mains power supply output. Integration of the micro-inverter into the solar PV module in this way provides many advantages, including greater efficiency and reliability. Additionally, embodiments of the invention avoid the need for bypass diodes, a component with a high failure rate in PV panels, providing lower power loss and higher reliability.