Converter circuit having control means with capability to short-circuit converter output

A boost-type converter circuit comprising a reactor connectable to an AC power supply and a control means for charging current in said reactor by short circuiting a converter output with a switching element and for outputting current charged in said reactor through a diode by turning off said switching element,

• said control means being provided, with respect to an error between an output DC voltage and its set value, with an integration operational function of the error and a proportion operational function of the error so that said control means sums outputs of said two operational functions and utilizes the resulting sum to determine an amplitude of an input current set value, and wherein when the error exceeds a certain value, said control means fixes the output of said integration operational function to a present value by forcing said switching element to turn off.

A boost-type converter circuit comprising a reactor connectable to an AC power supply and a control means for charging current in said reactor by short circuiting a converter output with a switching element and for outputting current charged in said reactor through a diode by turning off said switching element,

• said control means being provided, with respect to an error between an output DC voltage and its set value, with an integration operational function of the error and a proportion operational function of the error so that said control means utilizes a multiplication result between a sum of outputs of said two operational functions and an absolute value of a voltage wave form of said AC power supply to determine an input current set value, and wherein when the input current set value based on the error exceeds a certain value, said control means uses a predetermined value for limitation.

A boost-type converter circuit comprising a reactor connectible to an AC power supply and a control means for charging current in said reactor by short circuiting a converter output with a switching element and for outputting current charged in said reactor through a diode by turning off said switching element,

• said control means being provided, with respect to an error between an output DC voltage and its set value, with an integration operational function of the error and a proportion operational function of the error so that said control means utilizes a multiplication result between a sum of outputs of said two operational functions and an absolute value of a voltage wave form of said AC power supply to determine an input current set value, and said control means detects an absolute value of input current to gain an error between the absolute value and the input current set value for performing one of a proportional integration-type characteristics operation having an integral characteristic at low frequency with respect to the error between the absolute value and the input current set value, and a proportional integration type characteristics operation having an integral characteristic at a low frequency and having a flat characteristic at a high frequency, so as to gain on- and off-duties of said switching element.

A boost-type converter circuit comprising a reactor connectible to an AC power supply and a control means for charging current in said reactor by short circuiting a converter output with a switching element and for outputting current charged in said reactor through a diode by turning off said switching element,

• said control means being provided, with respect to an error between an output DC voltage and its set value, with an integration operational function of the error and a proportion operational function of the error so that said control means utilizes a multiplication result between a sum of outputs of said two operational functions and an absolute value of a voltage wave form of said AC power supply to determine an input current set value, and said control means detects an absolute value of input current to gain an error between the absolute value and the input current set value for performing one of a proportional integration-type characteristics operation having an integral characteristic at low frequency with respect to the error between the absolute value and the input current set value, and a proportional integration type characteristics operation having integral characteristics at low frequency and having a moving averaging characteristic at high frequency, so as to gain on- and off-duties of said switching element.